A cynic is a man who knows the price of everything, and the value of nothing.

I am so clever that sometimes I don't understand a single word of what I am saying.

The man who is fond of books is usually a man of lofty thought, and elevated opinions.

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

I am a part of everything that I have read.

Don't worry that children never listen to you; worry that they are always watching you.

The schools ain't what they used to be and never was.

In order to stave off covetouness, greed, and spite, citizens world over must be educated.

There is one quality which one must possess to win, and that is definiteness of purpose, the knowledge of what one wants, and a burning desire to possess it.

Real knowledge is to know the extent of one's ignorance.

Seek knowledge from the cradle to the grave.

Words can be like X-rays if you use them properly - they'll go through anything. You read and you?re pierced.

I like poems you can tack all over with a hammer and there are no hollow places.

Knowledge becomes evil if the aim be not virtuous.

What is now proved was once only imagined.

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.

Show me a family of readers, and I will show you the people who move the world.

Science is what we have learned about how to keep from fooling ourselves.

Just when I thought there wasn't room enough for another thought in my head, I had this great idea.

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

Knowing others is wisdom, knowing yourself is Enlightenment.