By far the best proof is experience.

Nothing destroys authority more than the unequal and untimely interchange of power stretched too far and relaxed too much.

Truth comes out of error more readily than out of confusion.

Another error is an impatience of doubt and haste to assertion without due and mature suspension of judgment. For the two ways of contemplation are not unlike the two ways of action commonly spoken of by the ancients; the one plain and smooth in the beginning, and in the end impassable; the other rough and troublesome in the entrance, but after a while fair and even. So it is in contemplation; if a man will begin with certainties, he shall end in doubts; but if he will be content to begin with doubts, he shall end in certainties.

There is in human nature generally more of the fool than of the wise.

A just fear of an imminent danger, though be no blow given, is a lawful cause of war.

Science is but an image of the truth.