A man is literally what he thinks.

Each day is a little life; every waking and rising a little birth; every fresh morning a little youth; every going to rest and sleep a little death.

He that cannot reason is a fool. He that will not is a bigot. He that dare not is a slave.

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

I don't know, I don't care, and it doesn't make any difference.

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

No one can make you feel inferior without your consent.

Tact is the knack of making a point without making an enemy.

Only from the heart can you touch the sky.

If you have no problems, then you have no clue to what is going.

Every aquarium will eventually leak.

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.

The only real laughter comes from despair.

One must wait until the evening to see how splendid the day has been.

Jealousy is the tribute mediocrity pays to genius.

The ultimate authority must always rest with the individual's own reason and critical analysis.

Sometimes you will never know the value of a moment until it becomes a memory.

How often I found where I should be going only by setting out for somewhere else.

Talent is God given. Be humble. Fame is man-given. Be grateful. Conceit is self-given. Be careful.

The impossible could not have happened, therefore the impossible must be possible in spite of appearances.

It's not a question of learning much.On the contrary.It's a question of UNLEARNING much.