The more complete the calm, the mightier the yogic power, the greater the force in action. In this calm, right knowledge comes. The thoughts of men are a tangle of truth and falsehood, satyam and anritam. True perception is marred and clouded by false perception, true judgment lamed by false judgment, true imagination distorted by false imagination, true memory deceived by false memory. The activity of the mind must cease, the chitta be purified, a silence fall upon the restlessness of Prakriti, then in that calm, in that voiceless stillness illumination comes upon the mind, error begins to fall away and, so long as desire does not stir again, clarity establishes itself in the higher stratum of the consciousness compelling peace and joy in the lower.
Right knowledge becomes the infallible source of right action.
Yogah karmasu kaushalam. The knowledge of the Yogin is not the knowledge of the average desire-driven mind. Neither is it the knowledge of the scientific or of the worldly-wise reason which anchors itself on surface facts and leans upon experience and probability. The Yogin knows God's way of working and is aware that the improbable often happens, that facts mislead. The desire-driven mind is emmeshed in the intricate tangle of good and evil, of the pleasant and the unpleasant, of happiness and misfortune.