The most savage controversies are those about matters as to which there is no good evidence either way.
You can never learn less, you can only learn more.
The highest activity a human being can attain is learning for understanding, because to understand is to be free.
Words can be like X-rays if you use them properly - they'll go through anything. You read and you?re pierced.
The man who does not read good books has no advantage over the man who can't read them.
What is freedom of expression? Without the freedom to offend, it ceases to exist.
A little knowledge is a dangerous thing. So is a lot.
Investigate, educate and organize.
Real learning comes about when the competitive spirit has ceased.
The highest result of education is tolerance.
The idea is to try to give all the information to help others to judge the value of your contribution; not just the information that leads to judgment in one particular direction or another.
A witty saying proves nothing.
A spirit of national masochism prevails, encouraged by an effete corps of impudent snobs who characterize themselves as intellectuals.
Physics is like sex: sure, it may give some practical results, but that's not why we do it.
Common sense is the collection of prejudices acquired by age eighteen.
If you want the present to be different from the past, study the past.
God created man in His own image, says the Bible; philosophers reverse the process: they create God in theirs.
Language is courage: the ability to conceive a thought, to speak it, and by doing so to make it true.
I had rather excel others in the knowledge of what is excellent, than in the extent of my power and dominion
Evil being the root of mystery, pain is the root of knowledge.
All sciences are vain and full of errors that are not born of Experience, the mother of all Knowledge.