Perhaps the most valuable result of al education is the ability to make yourself do the thing you have to do, when it ought to be done, whether you like it or not.

Every great advance in natural knowledge has involved the absolute rejection of authority.

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

Science is simply common sense at its best--that is, rigidly accurate in observation, and merciless to fallacy in logic.

Sit down before fact as a little child, be prepared to give up every preconceived notion, follow humbly wherever and to whatever abysses nature leads, or you shall learn nothing.

A world of facts lies outside and beyond the world of words.

A man's worst difficulties begin when he is able to do as he likes.

Sit down before fact as a little child, be prepared to give up every preconceived notion, follow humbly wherever and to whatever abyss nature leads, or you shall learn nothing.

Agnosticism simply means that a man shall not say he knows or believes that for which he has no grounds for professing to believe.

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

The world makes up for all its follies and injustices by being damnably sentimental.

In scientific work, those who refuse to go beyond fact rarely get as far as fact.

Science is organized common sense where many a beautiful theory was killed by an ugly fact.

Time, whose tooth gnaws away at everything else, is powerless against truth.