"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 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."