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

Physics is like sex: sure, it may give some practical results, but that's not why we do it.

Those who fail to learn the lessons of history are doomed to repeat them.

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

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

Know what you are talking about.

I learned very early the difference between knowing the name of something and knowing something.

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

You can never be overdressed or overeducated.

Evil being the root of mystery, pain is the root of knowledge.

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

Industrialize or perish.

In order to stave off covetouness, greed, and spite, citizens world over must be educated.

Dare to think for yourself.

To read is to fly: it is to soar to a point of vantage which gives a view over wide terrains of history, human variety, ideas, shared experience and the fruits of many inquiries.

I am a part of everything that I have read.

Reading without reflecting is like eating without digesting.

Show me a family of readers, and I will show you the people who move the world.

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

I cannot live without books.

If help and salvation are to come, they can only come from the children, for the children are the makers of men.