“Any truth is better than indefinite doubt.”

I am a brain, The rest of me is a mere appendix.

We would not dare to conceive the things which are really mere common places of existence.

A man should keep his little brain attic stocked with all the furniture that he is likely to use, and the rest he can put away in the lumber room of his library, where he can get it if he wants it.

Evil indeed is the man who has not one woman to mourn him.

There is danger for him who taketh the tiger cub, and danger also for whoso snatches a delusion from a woman.

Of all ruins, that of a noble mind is the most deplorable.

If i could be assured of your destruction, i would in the interest of the public, cheerfully accept my death.

When a doctor does go wrong he is the first of criminals.

A change of work is the best rest.

There are times, young fellah, when every one of us must make a stand for human right and justice, or you never feel clean again.

Mediocrity knows nothing higher than itself; but talent instantly recognizes genius.

You see, but you do not observe.

It is stupidity rather than courage to refuse to recognize danger when it is close upon you.

To let the brain work without sufficient material is like racing an engine. It racks itself to pieces.

Life, it turns out, is infinitely more clever and adaptable than anyone had ever supposed.

We can’t command our love, but we can our actions.

The doubter is a true man of science: he doubts only himself and his interpretations, but he believes in science.

The great experimental principle, then, is doubt, that philosophic doubt which leaves to the mind its freedom and initiative, and from which the virtues most valuable to investigators in physiology and medicine are derived.

Fear is a killer, when it comes to the creative process.

The first thing dictators do is finish free press, to establish censorship. There is no doubt that a free press is the first enemy of dictatorship.

It’s not that I want to be, but it’s a fascination of the mind and it plays a role in why I want to live my life a certain way.

The probability that we face global warming caused by fossil fuels is now so overwhelming that it is legitimate to doubt the motives of those who deny it

The more I am aware of my mortality the better person I am and the better I am at choosing a life that is aware of its beauty.

I am afraid of the worst, but I am not sure what that is.