For a successful technology, reality must take precedence over public relations, for Nature cannot be fooled.
The most savage controversies are those about matters as to which there is no good evidence either way.
Make it a rule never to give a child a book you would not read yourself.
That men do not learn very much from the lessons of history is the most important of all the lessons that history has to teach.
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.
A child educated only at school is an uneducated child.
The man who does not read good books has no advantage over the man who can't read them.
Science is a rising force, It is creating a new world about us. It needs to be watched and pressed into service, and in any case, it would be courting disaster to ignore it.
It isn't what we don't know that gives us trouble, it's what we know that ain't so.
All knowledge that the world has ever received comes from the mind; the infinite library of the universe is in our own mind.
Learning never exhausts the mind.
I cannot live without books.
Reading furnishes the mind only with materials of knowledge; it is thinking that makes what we read ours.
A little knowledge is a dangerous thing. So is a lot.
Don't worry that children never listen to you; worry that they are always watching you.
Many much-learned men have no intelligence.
Knowing others is wisdom, knowing yourself is Enlightenment.
The whole of science is nothing more than a refinement of everyday thinking.
Any man who reads too much and uses his own brain too little falls into lazy habits of thinking.
I do not know how to teach philosophy without becoming a disturber of the peace.
Any sufficiently advanced technology is indistinguishable from magic.