Vāsanā

Vāsanā is a behavioural tendency or karmic imprint which influences the present behaviour of a person. It is a technical term in Indian philosophy, particularly Yoga, Buddhist philosophy, and Advaita Vedanta.

Nomenclature, orthography and etymology

Vāsanā and its near homonym vasana are from the same Indo-European linguistic root, sharing a common theme of 'dwelling' or 'abiding'.

Vāsanā :
* Past impressions, impressions formed, the present consciousness of past perceptions;
* The impression of anything in the mind, the present consciousness formed from past perceptions, knowledge derived from memory, the impressions remaining in the mind;
* Thinking of, longing for, expectation, desire, inclination.
Vasana : cloth, clothes, dress, garment, apparel, attire, dwelling or abiding.
Vāsanai : fragrance. Outside philosophical use, the borrowed word in Tamil keeps intact the root meaning for 'vāsanā'.
Buddhism

Keown defines the term generally within Buddhism as follows:

"vāsanā. Habitual tendencies or dispositions, a term, often used synonymously with bīja. It is found in Pāli and early Sanskrit sources but comes to prominence with the Yogācāra, for whom it denotes the latent energy resulting from actions which are thought to become ‘imprinted’ in the subject's storehouse-consciousness. The accumulation of these habitual tendencies is believed to predispose one to particular patterns of behaviour in the future."

Sandvik states that:
D.T. Suzuki in The Lankavatara Sutra, connects vasana to its other meaning, 'infusing':
"Discrimination is the result of memory accumulated from the unknown past. Vasana literally means "perfuming," or "fumigation," that is, it is a kind of energy that is left behind when an act is accomplished and has the power to rekindle the old and seek out new impressions. Through this "perfuming," reflection takes place which is the same thing as discrimination, and we have a world of opposites and contraries with all its practical consequences. The triple world, so called, is therefore the shadow of a self-reflecting and self-creating mind. Hence the doctrine of "Mind-only"." p.96

Cheng Weishi Lun

states that the Cheng Weishi Lun, a commentary on Vasubandhu's Triṃśikā-vijñaptimātratā, lists three types of vāsanā, which are synonymous with 'bija' or 'seeds':

Vāsanā of 'names and words' or 'terms and words which equates to 'latent linguistic conditioning'. These seeds, planted in the 'root consciousness' by 'terms and words' are the 'causes' and 'conditions' of each 'conditioned or caused element or phenomena'. There are two forms:
# 'Terms and words indicating a referent' through which a mindstream is able to express meanings by differentiation of vocal sounds ; and
# 'Terms and words revealing perceptual-fields', through which a mindstream discerns perceptual-fields as ' phenomena of mind'.
Vasanas of self-attachment denoting the false attachment to the seeds of 'me' and 'mine'.
Vasanas which link streams-of-being denoting the karmic seeds, 'differently maturing that carry over from one stream-of-being to another in the Three Worlds. The bhavanga is of two types:
# Contaminated yet advantageous that is actions which produce desirable fruits; and
# Disadvantageous, that is actions which produce undesirable fruits.
Bon & Dzogchen

Bag chags are important in Bonpo soteriology, especially the view of the Bonpo Dzogchenpa, where it is fundamentally related to the key doctrines of 'Primordial Purity' from the Tibetan:

Hinduism

The Ahirbudhnya Samhita describes vasana as seeds whose fruit is rebirth.

Vaishanavism

, a principal text for the Vaishnava tradition of Sanatana Dharma employs the term 'vasana':

Devanagari	Roman Transcription
स वासनात्मा विषयोपरक्तो	sa vāsanātmā viṣayoparakto
गुणप्रवाहो विकृतः षोडशात्मा	guṇa-pravāho vikṛtaḥ ṣoḍaśātmā
बिभ्रत्पृथतङनामभि रूपभेदम्	bibhrat pṛthań-nāmabhi rūpa-bhedam
अन्तर्बहिष्ङवं च पुरैस्तनोति	antar-bahiṣṭvaṁ ca purais tanoti

A satisfactory English rendering has not yet been sourced, but the import is that the 'imprinted-volitions-of-mind', whether pious or impious, are conditioned by the Gunas. The gunas propel the mind into different 'formations'. The 'mind' is the master of the sixteen material elements. Its 'refined or coarse quality' determines the mind-formations of manifestation.

Advaita Vedanta

A vasana literally means 'wishing' or 'desiring', but is used in Advaita in the sense of the sub-conscious or latent tendencies in one’s nature.
Writing from an Advaita Vedanta perspective, Waite refers to a model offered by Edward de Bono: