Our usual understanding of senses as functioning of physical organs animated by life-force is not the final truth; the essence is the indirect contact of mind with matter which happens almost instantaneously through the threes sheaths or koshas: Annamaya-Kosha, Pranamaya-Kosha, Manomaya-Kosha.
Nervous electric energy flows (bidirectional) mediate between the sense organs and the mind for full registration and value ascription. The contact of mind with matter is mediated by life-energy in three successive stages of translation: eidolons (inaccurate representations) of matter, nervous energy image, and mental image. The three koshas have a continuity on the density spectrum, with matter the densest and mind the subtlest.
The broadest understanding of sensory contact is active consciousness meeting 'other' consciousness at all planar levels, which is essentially the Self in 'another' formal instantiation. Active consciousness is that which enters into some dynamic relation or interchange with 'another' unit of consciousness, instead of remaining statically self-absorbed.
Such contact has four necessary functions –
a. Vijnana: simultaneous possession, enjoyment and use of the essence, the totality, the parts and properties in one comprehensive image, also known as ‘real idea’ – original, spontaneous, true and complete.
b. Prajnana: Apprehensive concept, or reaching out to grasp the objectified (other) consciousness to possess its knowledge analytically and synthetically.
[This is the Self’s chosen process of the Purusha-Prakriti distinction and divisive consciousness in manifest reality, leading to the separative ignorance.]
c. Samjnana: Apprehensive percept, or drawing in the object to sensorially possess and feel it –this is a vital equivalent of the mental Prajnana.
d. Ajnana: Mastery, possession and governance of the object in its comprehensive power and native utility.
Our current psychology operates in the sequence of (c), (b), (a) and (d). At some point between (b) and (a), the subconscient and superconscient also operate, unbeknownst to us, such as in sleep, or trance, or a gap in mental activity. Our current mental consciousness has the capacities for (c) and (b) fully developed, but not for (a) and (d) which are the spontaneous province of the supermind, for which the intelligent will (the will to know) and the rational intellect somehow manage to stand in.
The inter-dimensional ‘contact’ point of the intellect and will reaching upwards in patient silence, and the supramental action reaching downwards to take charge of the lower principle and gradually transmute it into the higher (its native functioning), is the locus of spiritual evolution.
~ Inspired by the commentary on the Kena Upanishad, Chapter 8