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

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

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

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.

What we know is a drop, what we don't know is an ocean.

Civilization is a race between disaster and education.

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.

Common sense is the collection of prejudices acquired by age eighteen.

We could never learn to be brave and patient, if there were only joy in the world

The delight of opening a new pursuit, or a new course of reading, imparts the vivacity and novelty of youth even to old age.

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.

A witty saying proves nothing.

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

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

All stable processes we shall predict. All unstable processes we shall control.

The first idea the child must acquire is that of the difference between good and evil.

Learning never exhausts the mind.

Educate the children and it won't be necessary to punish the men.

Investigate, educate and organize.

I cannot live without books.

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.