Any knowledge that doesn't lead to new questions quickly dies out: it fails to maintain the temperature required for sustaining life.

The reading of all good books is like conversation with the finest men of past centuries.

When you know better you do better.

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

No man's knowledge here can go beyond his experience.

Men are born ignorant, not stupid. They are made stupid by education.

Language is courage: the ability to conceive a thought, to speak it, and by doing so to make it true.

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

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

The secret of life is not enjoyment but education through experience.

My alma mater was books, a good library.... I could spend the rest of my life reading, just satisfying my curiosity.

Many much-learned men have no intelligence.

Patience is a virtue, and I'm learning patience. It's a tough lesson.

To educate a person in the mind but not in morals is to educate a menace to society.

The first principle is that you must not fool yourself and you are the easiest person to fool.

Reading without reflecting is like eating without digesting.

Knowledge becomes evil if the aim be not virtuous.

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

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

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

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