Introduction to Brahman - Part 1

Ignorant people identify themselves with the body, mind, Prana and the senses on account of nescience or Avidya. They mistake these false perishable limiting adjuncts or vehicles for the pure immortal Atman and so they are caught in the round of births and deaths. But some wise people abandon this false identification, separate themselves from these limiting adjuncts through enquiry, discrimination, Anvayavyatireka Yukti and practice of 'Neti-Neti' doctrine (I am not this body, I am not this Prana, I am not this mind, I am not the senses), identify themselves with the all-pervading, immortal, pure Brahman, obtain knowledge of Brahman and attain immortality.

One becomes immortal by renouncing all desires. In this world man always talks of 'my son', 'my wife', 'my house', etc. The wise abandon all such worldly talks and worldly desires and attain immortality by meditation on Brahman who is the ear of the ear, the mind of the mind, etc. The Sruti says, Not by works, not by offspring, not by wealth, but by renunciation alone is immortality attained. When all desires are abandoned here they attain the Brahman. Having turned his senses inward for desire of immorality, the wise man attains Brahman.

Just as water in a cup borrows it heat from sun or fire, so also the mind, Prana and senses borrow their light and power from Atman. Atman is the source for all these organs. The ear hears through the light of the Atman, the tongue speaks through the power of Atman, the mind thinks through the intelligence of Atman and Prana performs its function through the power of Atman only. Mind and these organs are inert and non-intelligent. They appear to be intelligent thought the light and power of the Atman. Brahman or the Atman gives to the ear the power of hearing, the mind the power of thinking, the tongue the power of speaking, the eye the power of seeing and the power of life to the Prana. It is therefore said that it is the ear of the ear, the mind of the mind, etc.
 
- Swami Sivananda