Pocket all your knowledge with your watch, and never pull it out in company unless desired.

Cautiously avoid speaking of the domestic affairs either of yourself, or of other people. Yours are nothing to them but tedious gossip; and theirs are nothing to you.

A man of sense soon discovers, because he carefully observes, where and how long he is welcome; and takes care to leave the company at least as soon as he is wished out of it. Fools never perceive whether they are ill timed or ill placed.

It seems to me that your doctor [Tronchin] is more of a philosopher than a physician. As for me, I much prefer a doctor who is anoptimist and who gives me remedies that will improve my health. Philosophical consolations are, after all, useless against real ailments. I know only two kinds of sickness--physical and moral: all the others are purely in the imagination.

Observe it, the vulgar often laugh, but never smile, whereas well-bred people often smile, and seldom or never laugh. A witty thing never excited laughter, it pleases only the mind and never distorts the countenance.

The manner of a vulgar man has freedom without ease, and the manner of a gentleman has ease without freedom.

All ceremonies are in themselves very silly things; but yet, a man of the world should know them. They are the outworks of Mannersand Decency, which would be too often broken in upon, if it were not for that defence, which keeps the enemy at a proper distance.