The Upanishads state, "When you realize that you are the Self, supreme source of light, supreme source of love, you transcend the duality of life and enter into the unitive state.”
The Holy Bible echoes teachings on subduing the base nature of the human ego - Proverbs (16:32), "He that is slow to anger is better than the mighty; and he that ruleth his spirit than he that taketh a city," and (25:28) "He that hath no rule over his own spirit is like a city that is broken down, and without walls." The True Self or Atman must conquer the False Self or Ego, and live according to God's immutable laws.
To conquer the Ego, is to conquer the vasanas, the residues of past actions and thoughts. Vasanas cause desire of wealth and acquisition, false knowledge, and ownership, and indulgences of the mind, and body. To escape from the False Self the polarities of existence, from this illusion of worldly pleasures, is to the first path towards cosmic union of the Atman (True Self) with the Brahman. As Plato says, "The first and best victory is to conquer self."
Listen to His Holiness The Dalai Lama's discourse on the conquering of the Self: