Many men are accustomed to shaving and they know that if they press the razor too hard they will cut the skin and if they do not press at all, it will not be possible to remove the unwanted hair. Only when they apply moderate pressure they will be able to attain the necessary result. The human mind is like a razor’s edge. Without controlling the mind too rigidly and without allowing it to go too freely, we should encourage it to do good acts, and we should control it when there is any tendency to participate in bad deeds. Only when your mind behaves in a manner in which it ought to, you can conduct yourself as a human being. Hence you must discriminate and distinguish between good and bad acts, and guide the mind in a moderate manner between the two extremes.

- Summer Showers in Brindavan 1974, Ch 2.