There is no authority who decides what is a good idea.
Science is what we have learned about how to keep from fooling ourselves.
The delight of opening a new pursuit, or a new course of reading, imparts the vivacity and novelty of youth even to old age.
The deepest sin against the human mind is to believe things without evidence.
The ability to observe without evaluating is the highest form of intelligence.
If the facts don't fit the theory, change the facts.
Don't learn to do, but learn in doing.
What sculpture is to a block of marble, education is to a human soul.
Education is an admirable thing, but it is well to remember from time to time that nothing that is worth knowing can be taught.
Dare to think for yourself.
Language is courage: the ability to conceive a thought, to speak it, and by doing so to make it true.
I have just three things to teach: simplicity, patience, compassion. These three are your greatest treasures.
I have no special talents. I am only passionately curious.
Many much-learned men have no intelligence.
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.
Necessity is the mother of invention.
You can never be overdressed or overeducated.
To educate a person in the mind but not in morals is to educate a menace to society.
You can never learn less, you can only learn more.
Learning never exhausts the mind.
Imagination is the source of every form of human achievement. And it's the one thing that I believe we are systematically jeopardizing in the way we educate our children and ourselves.