What is now proved was once only imagined.
Although modesty is natural to man, it is not natural to children. Modesty only begins with the knowledge of evil.
I have just three things to teach: simplicity, patience, compassion. These three are your greatest treasures.
A child miseducated is a child lost.
Study without desire spoils the memory, and it retains nothing that it takes in.
Education is an admirable thing, but it is well to remember from time to time that nothing that is worth knowing can be taught.
The reading of all good books is like conversation with the finest men of past centuries.
No power and no treasure can outweigh the extension of our knowledge.
The whole of science is nothing more than a refinement of everyday thinking.
Knowledge becomes evil if the aim be not virtuous.
I do not know how to teach philosophy without becoming a disturber of the peace.
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.
It took us three years to build the NeXT computer. If we'd given customers what they said they wanted, we'd have built a computer they'd have been happy with a year after we spoke to them - not something they'd want now.
He who would learn to fly one day must first learn to stand and walk and run and climb and dance; one cannot fly into flying.
You can never learn less, you can only learn more.
Science is not only a disciple of reason but, also, one of romance and passion.
If I could explain it to the average person, I wouldn't have been worth the Nobel Prize.
An investment in knowledge pays the best interest.
The most savage controversies are those about matters as to which there is no good evidence either way.
The real solution lies in a world in which charity will have become unnecessary.
God created man in His own image, says the Bible; philosophers reverse the process: they create God in theirs.