Make pleasure and pain, gain and loss, victory and defeat, the same to thee. Be free from the 'pairs of opposites' and constant in the quality of Sattwa. Let, then, the motive for action be in the action itself, and not in the event. Do not be incited to actions by the hope of their reward, nor let thy life be spent in inaction. Equal-mindedness is called Yoga.
Yoga is skill in the performance of actions.
The man whose heart and mind are not at rest is without wisdom or the power of contemplation. The man who doeth that which he hath to do, without attachment to the result, obtaineth the Supreme. Whatever is practised by the most excellent men, that is also practised by others. The world follows whatever example they set. It is better to do one's own duty, even though it be devoid of excellence, than to perform another's duty well.