Choose rather to be strong of soul than strong of body.

The trouble with most of us is that we would rather be ruined by praise than saved by criticism.

All truth passes through three stages. First, it is ridiculed. Second, it is violently opposed. Third, it is accepted as being self-evident.

Never put off for tomorrow, what you can do today.

Love make us poets, and the approach of death should make us philosophers.

Never ruin an apology with an excuse.

If you don't stand for something you will fall for anything.

Love one another, but make not a bond of love: Let it rather be a moving sea between the shores of your souls.

Appearances often are deceiving.

I dream. Sometimes I think that's the only right thing to do.

Although our intellect always longs for clarity and certainty, our nature often finds uncertainty fascinating.

The only real mistake is the one from which we learn nothing.

A wise man can learn more from a foolish question than a fool can learn from a wise answer.

Nothing fixes a thing so intensely in the memory as the wish to forget it.

For we walk by faith, not by sight

Whatever it is you're seeking won't come in the form you're expecting.

Immoderate desire is the mark of a child, not a man.

When you learn, teach, when you get, give.

There are two educations. One should teach us how to make a living and the other how to live.

Each problem that I solved became a rule which served afterwards to solve other problems.

There's no sense in being precise when you don't even know what you're talking about.