In treating of our conduct to others, Schopenhauer seems always to be peering down and sounding bottom in unfathomed depths of the human heart, and to be taking measure of those crevices and sinuosities for which Balzac and La Rochefoucauld, with all their equipment of bitterness, possessed no adequate compass. The result of his soundings and measurements is a lesson of circumspection and indulgence, of which the first stands as guarantee against prejudice, and the second as shelter from quarrels and disputes. Machiavelli warned every one to as carefully avoid an injury to the self-esteem of an inferior as one would the commission of a crime. Schopenhauer goes even further; his theory is that whoever is obliged to live among his fellows should never repulse any one, however pitiful, wicked, or ridiculous his character may be; on the contrary, he should accept him as something immutable, and consider that there must necessarily be some one of that class too. If he does otherwise he commits not only an imprudence, but provokes a life-long enmity, for, after all, no one can modify his own character, and if a man is condemned unreservedly there is, of necessity, nothing left for him to do but to declare war to the knife. It is for this reason that when one wishes, or is obliged to live among his fellow-creatures, it becomes necessary to let each one work out his own nature and accept each individual as he stands; the most that can be done is to attempt to utilize the qualities and dispositions of each, so far as they may be adaptable, but in no case is a man to be condemned purely and simply for what he is. This is the true signification of the dictum, Live and let live. Meanwhile, in learning how to treat others it will not come amiss, Schopenhauer goes on to say, to exercise a little patience on any of the inanimate objects which in virtue of some physical or mechanical necessity obstinately annoy and thwart us every day; for in so doing we learn to bestow on our fellows the patience already acquired, and in this manner become accustomed to the thought that they, too, whenever they form an obstacle to our wishes, do so because they cannot help it, in virtue of a natural law which is as rigorous as that which acts on inanimate things, and because it is as absurd to get angry with them as to be annoyed at the stone which slips between our feet.