But let his questions not be troublesome; for that is fit for a poser. And let him be sure to leave other men, their turns to speak. Nay, if there be any, that would reign and take up all the time, let him find means to take them off, and to bring others on; as musicians use to do, with those that dance too long galliards. If you dissemble, sometimes, your knowledge of that you are thought to know, you shall be thought, another time, to know that you know not. Speech of a man's self ought to be seldom, and well chosen. I knew one, was wont to say in scorn, He must needs be a wise man, he speaks so much of himself: and there is but one case, wherein a man may commend himself with good grace; and that is in commending virtue in another; especially if it be such a virtue, whereunto himself pretendeth.

32 Of Discourse by Francis Bacon