AUM
AUM is a sacred syllable that is considered to be the greatest of all the mantra (sacred utterance). The syllable AUM is composed of the three sounds A-U-M (in Sanskrit, the vowels A and U coalesce to become O), which represent several universal triads. Thus, AUM mystically embodies the essence of the entire universe. It is uttered at the beginning and end of prayers, chants, and meditation.
AUM should be vocalized as A-U-M, and not OM.


Buddhi
Buddhi is derived from the Vedic Sanskrit root Budh, which literally means "to wake, be awake, observe, heed, attend, learn, become aware of, to know, be conscious again".
Buddhi refers to our "wisdom mind" - the intellectual faculty and the power to "form and retain concepts, reason, discern, judge, comprehend & understand".
The purpose of Yoga is to train our Buddhi to help us make the right choice as it is our inner wisdom.
Manas
Manas refers to our "thinking mind" - the general thinking faculty, the conscious thinking via volition. It is the Manas that manifests intentions into thoughts, speech and actions.
The purpose of Yoga is to ensure that what we manifest in thought, speech & action are true & aligned with our true self.
Citta
The Citta refers to our "emotional mind" - your likes & dislikes, agitation & phobia etc. It is our Citta that reacts to emotional triggers.
An untrained Citta is why your attention jumps from one object to another. Without a specified object to focus on, the Citta is restless and unstable, fluctuating like a waveform, arising and falling. The purpose of Yoga is to tame this "monkey mind", and achieve a state of equanimity.
Patanjali’s Yoga Sutra categorizes Vritti into five types, each with its unique characteristics and effects on the mind.
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Right Cognition (Pramana): It refers to the ability to perceive information correctly based on our beliefs, experiences, and moral values.
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Misconception (Viparyaya): This vritti occurs when the mind incorrectly interprets sensory information.
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Imagination (Vikalpa): This vritti represents the mind’s ability to create mental images, fantasies, and daydreams.
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Sleep (Nidra): This vritti is more than just the absence of wakefulness. It’s an altered state of consciousness where the mind’s thought patterns are significantly reduced.
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Memory (Smriti): Smriti, or “memory,” involves the recollection of past sensations or emotions, both conscious and unconscious.
Within the realm of Pramana, the mind employs a diverse set of tools to determine the validity of information. These six types of Pramana Vritti are essential to our understanding of the world:
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Direct Experience (Pratyaksha): This is the most straightforward form of Pramana, relying on sensory perception. What we see, hear, taste, touch, and smell directly informs our understanding of reality.
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Inference (Anumana): Inference involves drawing conclusions based on observations. For example, if we see smoke, we infer the presence of fire.
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Comparison (Upamana): Upamana Pramana relies on comparison. When we relate something new to something familiar, we gain insights. For instance, a new fruit is described as “like an apple.”
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Postulation (Arthapatti): This form of Pramana helps us understand scenarios where direct evidence is lacking. For example, if a person never eats during the day but remains healthy, we postulate that they eat at night.
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Non-apprehension (Anupalabdhi): Anupalabdhi is the perception of the absence of something. It’s the recognition that something we expected to see or experience is not present.
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Verbal Testimony (Sabda): This involves gaining knowledge from credible sources, such as teachers, books, or experts. It’s an important Pramana as it enables us to access knowledge beyond our direct experiences.
Viparyaya, often referred to as “misconception,” represents one of the five Vrittis that shape our mental landscape. This Vritti occurs when the mind incorrectly interprets sensory information, leading to a distortion of reality. In the intricate tapestry of the mind’s fluctuations, Viparyaya can be likened to a mirage, where what we perceive may not align with the truth.
Vikalpa, often associated with imagination, is a fascinating Vritti that explores the creative depths of the mind. This mental fluctuation allows us to conjure mental images, fantasies, and daydreams. While imagination can be a wellspring of inspiration and innovation, it also has the potential to lead the mind astray if left unchecked. Uncontrolled imagination (Vikalpa) can be likened to a wandering mind lost in fantasy. It often leads to daydreaming, doubt, and indecision. While brief moments of wandering imagination can be harmless, unchecked Vikalpa Vritti can become a source of distraction and mental turmoil.
Nidra, the Vritti of sleep, introduces us to an altered state of consciousness that is both mysterious and profound. In the landscape of mental fluctuations, Nidra represents a unique state where the mind’s thought patterns are significantly reduced. It’s a state where we experience rest and restoration, but it’s not merely the absence of wakefulness. Nidra is akin to the moments just before falling asleep or those right upon waking. It’s a state where the mind’s usual chatter subsides, and we find ourselves in a realm where thoughts are minimal, if not absent. It’s a transient state that holds great potential for self-discovery and transformation. Quality sleep is essential for our overall well-being, both physically and mentally. Nidra not only allows the body to rejuvenate but also offers the mind a reprieve from the incessant thought waves of the waking state. It’s during these moments of rest that we find a sense of inner peace and balance. Patanjali recognized the significance of experiencing peace of mind during deep sleep. In Yoga Sutra (1.38), he emphasizes the value of studying dreams and deep sleep states as a means to stabilize the mind.
Smriti, often referred to as “memory,” is a Vritti that takes us on a journey through the corridors of our past. It involves the recollection of lasting impressions, both conscious and unconscious, that have been imprinted on the canvas of our mind by past sensations and emotions.
Think of Smriti as the mental archive that stores our life’s experiences, both significant and mundane. It encompasses memories of joy, sorrow, love, and countless other emotions, each with its unique vibrancy and texture. These memories shape our perception of the world and influence our responses to present situations.
People are often not living in the present, trapped in the illusions of the past (memories based off various emotions) or the future (fear, anxiety or worry).
To stop waves, we have to create waves, thus in the Yoga Sutras (1:5) there are five vritti hinderous and helpful.
These are:
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Prāmana - literally "the measure of", it is the movement of thought when we experience something directly, or (by inference) infer what an experience is like, or we hear an account of what it is like that is not falsified when experienced.
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Viparyaya - misapprehension of one thing for another, which is falsified when actually experienced.
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Vikalpah - verbal abstraction or imagination without an objective experience
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Nidrā - waking continuum from distraction to oblivion to full sleep without the support of cognition
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Smrtayah - remembering both the material of experience and its cognition.

Ahamkara
Ahamkara is often translated as "ego" or "ego-consciousness", but it is actually more than that. It is the fabricated "false identity", consisting of personal pride, status in society, position at work etc.
And because of all these factors, you are enslaved to your "false-identity".
The purpose of Yoga is to dissolve this false sense of "self-identity".

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Smrti
Smrti is a Sanskrit word, from the root Smara, which means "remembrance, reminiscence, thinking of or upon, calling to mind", or simply "memory".
Samskara
Samskara are the mental fabrications left by all thoughts, intentions and actions that an individual has ever experienced.
Samskara are thought patterns, and can be considered as psychological or emotional imprints that contribute to the formation of behavioral patterns. Samskaras are below the level of normal consciousness and are said to be the root of all impulses, character traits and innate dispositions.
Vasana
Vasana are the inherent tendencies developed from Samskara (impressions) from the present and past lifetimes that fuel the cycle of birth & death (Samsara) until they are exhausted.
It is believed that it is stored in our Hidden (Sub)conscious, which explains why we might like/dislike someone or something without any reason, or tend to know of something when we have not done it before, or know of places that we have not been there in this lifetime.
Klesa
Klesa are the afflictions of the mind, factors resulting in anguish, suffering and distress.
The 5 Klesa are:
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Avidya (Delusion-Ignorance) is false knowledge, misunderstanding, or a lack of knowledge. Avidya is the first of the Klesha because it is the basis for the others. By destroying Avidya, the other Klesha are no longer an obstacle. Avidya obscures the higher Self by firmly establishing negative habits and preventing change.
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Asmita (Egoism) is the attachment to ego and the ego's sense of reality. It is the false identification, mistaking the physical, emotional and mental aspects of the mind-body for the true Self.
- Raga (Attachment) is the desire (craving+attachment) for material objects, relationships, status, power or other unwholsome desires.
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Dvesha (Repulsion) is aversion to unpleasant things, people and experiences. Manifestations include dislike, anger, wrath, rage & hatred.
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Abhinivesa (Fear) is the fear of death, and desire to cling to life, even if life is filled with misery.
Pancha-Kosha
Kosha, often translated as "sheath", is a covering of the Atman, or "self" according to Vedantic philosophy.
The five sheaths (Pancha-Kosha) are described in the Taittiriya Upanishad (2.1-5), and they are often visualised as the layers of an onion:
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Annamaya-Kosha: "Food" sheath -The physical body.
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Pranamaya-Koshaa: "Energy" sheath - Prana, Shakti, Nadi, Chakra, Aura (Bio-electromagnetic field).
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Manomaya-Kosha: "Mind" sheath - The thinking mind, emotions, likes & dislikes, agitation & phobia.
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Vijnanamaya-Kosha: "Knowledge" sheath - Conscience, wisdom, discernment, intellect.
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Anandamaya-Kosha: "Bliss" sheath - Pure consciousness/awareness, connection with the universe.

Traya-Sarira
The Pancha-Kosha are further classified as Traya-Sarira (Three Bodies):
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Sthula-Sarira: The gross body, made up of physical matter, consists of Annamaya Kosha.
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Suksma-Sarira: The astral body, consists of Pranamaya Kosha, Manomaya Kosha and Vijnanamaya Kosha.
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Karana-Sarira: The causal body, consists of Ananadamaya Kosha.
Thus, the Pancha-Kosha/Traya-Sarira basically consistutes what we know as the "self".
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Physical Form
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Mental-Emotional Energies
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Karmic Energies (The Hidden Consciousness, aka The Sub-consciousness)
