Bhagavad Gita · Chapter 2: The Path of Understanding

Bhagavad Gita 2.38

sukhaduḥkhe same kṛtvā lābhālābhau jayājayau | tato yuddhāya yujyasva naivaṃ pāpamavāpsyasi ||

Treat pleasure and pain, gain and loss, victory and defeat alike, and then engage in battle. In this way you will incur no sin.

Modern context

Here the Gita goes beyond heaven, fame and reward. Treat pleasure and pain, gain and loss, victory and defeat alike, and then act. This is the first statement of its central idea: what makes an action clean is the evenness of mind from which it is done. An act done without craving for gain or dread of loss does not bind the one who does it.