Just like pure water poured in a dirty cup becomes dirty, similarly the pure ego rooted in the impure mind becomes impure ego. - Baba Hari Dass

Among creations I am the beginning, the middle, and also the end, O Arjuna, I am the science of the Self, and I am the logic of all arguments.

Having made pleasure and pain, gain and loss, victory and defeat the same, you engage in battle for the sake of battle; thus you shell win and not incur sin. (Bhagavad Gita, Ch II, verse 38) Here, Sri Krishna is saying that if Arjuna has neither desire for heaven nor for sovereignty over the earth, then he should achieve equanimity of the mind. With equanimity of the mind one can achieve success in the war of life. Without it, one cannot remain unaffected by the pairs of opposites and will be continually tossed about by the waves of egocentric likes and dislikes.

Yoga is defined as a method – the process of nirodha (mental control) – by which union (the goal of yoga) is achieved. Yoga is therefore both the process of nirodha and the unqualified state of niruddha (the perfection of that process). The word yoga (union) implies duality (as in joining of two things or principles); the result of yoga is the nondual state..., or as the union of the lower self and higher Self. The nondual state is characterized by the absence of individuality; it can be described as eternal peace, pure love, Self-realization, or liberation.