“The duality of the material world is felt in terms of heat and cold, or misery and happiness. A Krishna conscious person is above duality because he does not hesitate to act in any way for the satisfaction of Krishna. Therefore he is steady both in success and in failure. These signs are visible when one is fully in transcendental knowledge.” (Shrila Prabhupada, Bhagavad-gita, 4.22 Purport)