Every aquarium will eventually leak.

Colorless green ideas sleep furiously

I think about the meaning of pain. Pain is personal. It really belongs to the one feeling it. Probably the only thing that is your own. I like mine.

You are braver than you believe, stronger than you seem, and smarter than you think.

Time flies over us, but leaves its shadow behind.

If you place your head in a lion's mouth, then you cannot complain one day if he happens to bite it off.

Experience teaches us that it is much easier to prevent an enemy from posting themselves than it is to dislodge them after they have got possession.

To do great things is difficult, but to command great things is more difficult.

Above all be of single aim; have a legitimate and useful purpose, and devote yourself unreservedly to it.

It is not enough to have a good mind; the main thing is to use it well.

Real knowledge is to know the extent of one's ignorance.

Men become wise just as they become rich, more by what they save than by what they receive.

If we can really understand the problem, the answer will come out of it, because the answer is not separate from the problem.

Mistakes are always forgivable, if one has the courage to admit them.

The only real laughter comes from despair.

Convictions are more dangerous enemies of truth than lies.

If you buy what you do not need, you will need what you cannot buy.

Happiness is not an ideal of reason, but of imagination.

Don't raise your voice, improve your argument.

To avoid criticism say nothing, do nothing, be nothing.

No one can make you feel inferior without your consent.