The only people, scientific or other, who never make mistakes are those who do nothing.

The great tragedy of science - the slaying of a beautiful hypothesis by an ugly fact.

Only one absolute certainty is possible to man, namely that at any given moment the feeling which he has exists.

The Bible has been the Magna Charta of the poor and of the oppressed.

If a little knowledge is dangerous, where is the man who has so much as to be out of danger?

It is not who is right, but what is right, that is of importance.

Thoughtfulness for others, generosity, modesty, and self-respect are the qualities which make a real gentleman or lady.

God give me strength to face a fact though it slay me.

Life is too short to occupy oneself with the slaying of the slain more than once.

The secret of genius is to carry the spirit of childhood into maturity.

Make up your mind to act decidedly and take the consequences. No good is ever done in this world by hesitation.

A man can't soar too high, when he flies with his own wings.

True vehement love is at the opposite side of sanity.

God is in you as the ocean is in the wave.

While the official productivity data look impressive, alternative measures that are equally reasonable show a much more subdued picture.

There is nothing in the world that is not mysterious, but the mystery is more evident in certain things than in others: in the sea, in the eyes of the elders, in the color yellow, and in music.

The media is a like any other group of people. Their universe is all that matters.

We can both prevent asteroid impacts and address climate change. It's not either-or.

There is no end to renunciation.

Quien sabe? Not me. The older I get the less I sabe, the less wisdom, maturity and caution I have.