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

The fullness of knowledge only comes through the awareness of ignorance.

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

The books that the world calls immoral are books that show the world its own shame.

Many much-learned men have no intelligence.

If you want the present to be different from the past, study the past.

Know what you are talking about.

Education is a system of imposed ignorance.

I do not know how to teach philosophy without becoming a disturber of the peace.

A man who has never gone to school may steal a freight car; but if he has a university education, he may steal the whole railroad.

Make it a rule never to give a child a book you would not read yourself.

He who would learn to fly one day must first learn to stand and walk and run and climb and dance; one cannot fly into flying.

The progressive development of man is vitally dependent on invention.

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

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

I prefer the company of peasants because they have not been educated sufficiently to reason incorrectly.

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

Books are for people who wish they were somewhere else.

All sciences are vain and full of errors that are not born of Experience, the mother of all Knowledge.

It is not enough for the teacher to love the child. She must first love and understand the universe. She must prepare herself, and truly work at it.

Investigate, educate and organize the country must progress, productive works and industries are the main avenues at present next to education for the advancement of the country