In traveling, a man must carry knowledge with him, if he would bring home knowledge.

It is more from carelessness about truth than from intentionally lying that there is so much falsehood in the world.

No man should attempt to teach others what he has never learned himself

Scarcely any degree of judgment is sufficient to restrain the imagination from magnifying that on which it is long detained

There are innumerable questions to which the inquisitive mind can in this state receive no answer: Why do you and I exist? Why was this world created? Since it was to be created, why was it not created sooner?

Whatever withdraws us from the power of our senses; whatever makes the past, the distant, or the future, predominate over the present, advances us in the dignity of thinking beings. Far from me, and far from my friends be such frigid philosophy as may conduct us indifferent and unmoved over any ground which has been dignified by wisdom, bravery, or virtue. That man is little to be envied whose patriotism would not gain force upon the plain of Marathon, or whose piety would not grow warmer among the ruins of Ionia.

We frequently fall into error and folly, not because the true principles of action are not known, but because for a time they are not remembered; he may, therefore, justly be numbered among the benefactors of mankind who contracts the great rules of life into short sentences that may early be impressed on the memory, and taught by frequent recollection to occur habitually to the mind.