A little knowledge that acts is worth infinitely more than much knowledge that is idle.

To every action there is always an equal and opposite or contrary, reaction

It isn't what we don't know that gives us trouble, it's what we know that ain't so.

God created man in His own image, says the Bible; philosophers reverse the process: they create God in theirs.

Any man who reads too much and uses his own brain too little falls into lazy habits of thinking.

Investigate, educate and organize.

Books! I dunno if I ever told you this, but books are the greatest gift one person can give another.

I cannot teach anybody anything. I can only make them think

Books are as useful to a stupid person as a mirror is useful to a blind person.

A witty saying proves nothing.

What sculpture is to a block of marble, education is to a human soul.

No man's knowledge here can go beyond his experience.

For a successful technology, reality must take precedence over public relations, for Nature cannot be fooled.

I don't look on poetry as closed works. I feel they're going on all the time in my head and I occasionally snip off a length.

Never help a child with a task at which he feels he can succeed.

Evil being the root of mystery, pain is the root of knowledge.

Education is the kindling of a flame, not the filling of a vessel.

Imagination is more important than knowledge.

Reading without reflecting is like eating without digesting.

You can never learn less, you can only learn more.

I decided to teach because I think that any person who studies philosophy has to be involved actively.