Seek knowledge from the cradle to the grave.
What is freedom of expression? Without the freedom to offend, it ceases to exist.
I am so clever that sometimes I don't understand a single word of what I am saying.
Education is an admirable thing, but it is well to remember from time to time that nothing that is worth knowing can be taught.
In mathematics you don't understand things. You just get used to them.
If help and salvation are to come, they can only come from the children, for the children are the makers of men.
When I am attacked by gloomy thoughts, nothing helps me so much as running to my books. They quickly absorb me and banish the clouds from my mind.
There is nothing more notable in Socrates than that he found time, when he was an old man, to learn music and dancing, and thought it time well spent.
The most savage controversies are those about matters as to which there is no good evidence either way.
It is what you read when you don't have to that determines what you will be when you can't help it.
Just when I thought there wasn't room enough for another thought in my head, I had this great idea.
The books that the world calls immoral are books that show the world its own shame.
No man's knowledge here can go beyond his experience.
It is better to know how to learn than to know.
It is possible to fly without motors, but not without knowledge and skill.
A little knowledge that acts is worth infinitely more than much knowledge that is idle.
Study without desire spoils the memory, and it retains nothing that it takes in.
Common sense is the collection of prejudices acquired by age eighteen.
A little knowledge is a dangerous thing. So is a lot.
If the facts don't fit the theory, change the facts.
The only true wisdom is in knowing you know nothing.