What is now proved was once only imagined.

If there were no bad people, there would be no good lawyers.

The most savage controversies are those about matters as to which there is no good evidence either way.

The more I read, the more I acquire, the more certain I am that I know nothing.

I cannot live without books.

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

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

If you're not learning while you're earning, you're cheating yourself out of the better portion of your compensation.

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.

Liberty without Learning is always in peril and Learning without Liberty is always in vain.

Dare to think for yourself.

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

Better know nothing than half-know many things.

Although modesty is natural to man, it is not natural to children. Modesty only begins with the knowledge of evil.

I think that kids have a greater capacity for processing things than we give them credit for.

There is no authority who decides what is a good idea.

What is freedom of expression? Without the freedom to offend, it ceases to exist.

Knowing is not enough; we must apply. Willing is not enough; we must do.

You can never be overdressed or overeducated.

Education is a human right with immense power to transform. On its foundation rest the cornerstones of freedom, democracy and sustainable human development.

Knowledge is of two kinds. We know a subject ourselves, or we know where we can find information upon it.