Do not reveal what you have thought upon doing, but by wise council keep it secret being determined to carry it into execution.

It is tact that is golden, not silence.

He who is cruel to animals becomes hard also in his dealings with men. We can judge the heart of a man by his treatment of animals.

Turn your wounds into wisdom.

It is always advisable to perceive clearly our ignorance.

Thought can be so seductive and hypnotic that it absorbs your attention totally, so you become your thoughts.

It is the mark of an educated mind to be able to entertain a thought without accepting it.

Drop the idea that you are Atlas carrying the world on your shoulders. The world would go on even without you. Don't take yourself so seriously.

The greatest pride, or the greatest despondency, is the greatest ignorance of one's self.

And no one will listen to us until we listen to ourselves.

The only real laughter comes from despair.

A house divided against itself cannot stand.

The more that you read, the more things you will know. The more that you learn, the more places you'll go.

It is better to be looked over than overlooked.

The one you buy will be the only one that doesn't work.

Not everything that can be counted counts, and not everything that counts can be counted.

Boredom is the root of all evil - the despairing refusal to be oneself.

Science may set limits to knowledge, but should not set limits to imagination.

Think globally, act locally.

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

If you don't want to slip up tomorrow, speak the truth today.