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

With educated people, I suppose, punctuation is a matter of rule; with me it is a matter of feeling. But I must say I have great respect for the semi-colon; it's a useful little chap.

Better know nothing than half-know many things.

The knowledge of all things is possible

If I could explain it to the average person, I wouldn't have been worth the Nobel Prize.

The man who does not read good books has no advantage over the man who can't read them.

When you know better you do better.

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

The progressive development of man is vitally dependent on invention.

Many much-learned men have no intelligence.

Study hard what interests you the most in the most undisciplined, irreverent and original manner possible.

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

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

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

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

Learning never exhausts the mind.

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

Investigate, educate and organize.

Free the child's potential, and you will transform him into the world.

Science is not only a disciple of reason but, also, one of romance and passion.

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