I am indebted to my father for living, but to my teacher for living well.

Most people have never learned that one of the main aims in life is to enjoy it.

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

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.

The deepest sin against the human mind is to believe things without evidence.

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

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

As we acquire more knowledge, things do not become more comprehensible but more mysterious.

Courage, conviction and confidence.

I have just three things to teach: simplicity, patience, compassion. These three are your greatest treasures.

Study without desire spoils the memory, and it retains nothing that it takes in.

Investigate, educate and organize.

Reading is to the mind what exercise is to the body.

God created man in His own image, says the Bible; philosophers reverse the process: they create God in theirs.

No power and no treasure can outweigh the extension of our knowledge.

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

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

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

Any man who reads too much and uses his own brain too little falls into lazy habits of thinking.

Intelligence plus character-that is the goal of true education.

When you know better you do better.