I like poems you can tack all over with a hammer and there are no hollow places.
Medicine is my lawful wife and literature my mistress; when I get tired of one, I spend the night with the other.
Science is what we have learned about how to keep from fooling ourselves.
Patience is a virtue, and I'm learning patience. It's a tough lesson.
In mathematics you don't understand things. You just get used to them.
It is what you read when you don't have to that determines what you will be when you can't help it.
The task of a writer is not to solve the problem but to state the problem correctly.
If the facts don't fit the theory, change the facts.
The man who is fond of books is usually a man of lofty thought, and elevated opinions.
What we know is a drop, what we don't know is an ocean.
God created man in His own image, says the Bible; philosophers reverse the process: they create God in theirs.
If you're not learning while you're earning, you're cheating yourself out of the better portion of your compensation.
The schools ain't what they used to be and never was.
The ability to observe without evaluating is the highest form of intelligence.
Learn as though you would never be able to master it; hold it as though you would be in fear of losing it.
It is beyond a doubt that all our knowledge begins with experience.
Integrity without knowledge is weak and useless, and knowledge without integrity is dangerous and dreadful.
Know what you are talking about.
The most savage controversies are those about matters as to which there is no good evidence either way.
Many much-learned men have no intelligence.
The books that the world calls immoral are books that show the world its own shame.