XXXIV. "Many circumstances," argues he, "may arise which may enable a bad man to steal into the place of a good one, or may cause a good man to be disliked as though he were a bad one; for appearances, to which we trust, are deceptive." Who denies it? Yet I can find nothing else by which to guide my opinion. I must follow these tracks in my search after truth, for I have none more trustworthy than these; I will take pains to weigh the value of these with all possible care, and will not hastily give my assent to them. For instance, in a battle, it may happen that my hand may be deceived by some mistake into turning my weapon against my comrade, and sparing my enemy as though he were on my side; but this will not often take place, and will not take place through any fault of mine, for my object is to strike the enemy, and defend my countryman. If I know a man to be ungrateful, I shall not bestow a benefit upon him. But the man has passed himself off as a good man by some trick, and has imposed upon me. Well, this is not at all the fault of the giver, who gave under the impression that his friend was grateful. "Suppose," asks he, "that you were to promise to bestow a benefit, and afterwards were to learn that your man was ungrateful, would you bestow it or not? If you do, you do wrong knowingly, for you give to one to whom you ought not; if you refuse, you do wrong likewise, for you do not give to him to whom you promised to give. This case upsets your consistency, and that proud assurance of yours that the wise man never regrets his actions, or amends what he has done, or alters his plans." The wise man never changes his plans while the conditions under which he formed them remain the same; therefore, he never feels regret, because at the time nothing better than what he did could have been done, nor could any better decision have been arrived at than that which was made; yet he begins everything with the saving clause, "If nothing shall occur to the contrary." This is the reason why we say that all goes well with him, and that nothing happens contrary to his expectation, because he bears in mind the possibility of something happening to prevent the realization of his projects. It is an imprudent confidence to trust that fortune will be on our side. The wise man considers both sides: he knows how great is the power of errors, how uncertain human affairs are, how many obstacles there are to the success of plans. Without committing himself, he awaits the doubtful and capricious issue of events, and weighs certainty of purpose against uncertainty of result. Here also, however, he is protected by that saving clause, without which he decides upon nothing, and begins nothing.