Nothing in the world is harder than speaking the truth and nothing easier than flattery. If there’s the hundredth part of a false note in speaking the truth, it leads to a discord, and that leads to trouble. But if all, to the last note, is false in flattery, it is just as agreeable, and is heard not without satisfaction. It may be a coarse satisfaction, but still a satisfaction. And however coarse the flattery, at least half will be sure to seem true. That’s so for all stages of development and classes of society. Crime And Punishment

What man can pretend to know the riddle of a woman's mind? Don Quixote

As surgeons keep their instruments and knives always at hand for cases requiring immediate treatment, so shouldst thou have thy thoughts ready to understand things divine and human, remembering in thy every act, even the smallest, how close is the bond that unites the two. Book III

The true disciple of philosophy is likely to be misunderstood by other men; they do not perceive that he is ever pursuing death and dying; and if this is true, why, having had the desire of death all his life long, should he repine at that which he has always been pursuing and desiring? The Trials Of Socrates