Most people have never learned that one of the main aims in life is to enjoy it.
Real knowledge is to know the extent of one's ignorance.
What is now proved was once only imagined.
When you know better you do better.
A child miseducated is a child lost.
The most important part of teaching is to teach what it is to know.
If you're teaching today what you were teaching five years ago, either the field is dead or you are.
The deepest sin against the human mind is to believe things without evidence.
My alma mater was books, a good library.... I could spend the rest of my life reading, just satisfying my curiosity.
The only good is knowledge and the only evil is ignorance.
The secret of life is not enjoyment but education through experience.
Evil being the root of mystery, pain is the root of knowledge.
To read is to fly: it is to soar to a point of vantage which gives a view over wide terrains of history, human variety, ideas, shared experience and the fruits of many inquiries.
As we acquire more knowledge, things do not become more comprehensible but more mysterious.
Necessity is the mother of invention.
If one cannot enjoy reading a book over and over again, there is no use in reading it at all.
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.
A little knowledge that acts is worth infinitely more than much knowledge that is idle.
Courage, conviction and confidence.
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.
Books are as useful to a stupid person as a mirror is useful to a blind person.
