I know that the arms of friendship are long enough to reach from the one end of the world to the other

Vexations may be petty, but they are vexations still.

Every other knowledge is harmful to him who does not have knowledge of goodness.

Whoever will imagine a perpetual confession of ignorance, a judgment without leaning or inclination, on any occasion whatever, hasa conception of Pyrrhonism.

Is there anything so grave and serious as an ass?

Learning is not to be tacked to the mind, but we must fuse and blend them together, not merely giving the mind a slight tincture, but a thorough and perfect dye. And if we perceive no evident change and improvement, it would be better to leave it alone; learning is a dangerous weapon, and apt to wound its master if it be wielded by a feeble hand, and by one not well acquainted with its use.

Traveling through the world produces a marvelous clarity in the judgment of men. We are all of us confined and enclosed within ourselves, and see no farther than the end of our nose. This great world is a mirror where we must see ourselves in order to know ourselves. There are so many different tempers, so many different points of view, judgments, opinions, laws and customs to teach us to judge wisely on our own, and to teach our judgment to recognize its imperfection and natural weakness.