If you can't explain it simply, you don't understand it well enough.

Reading furnishes the mind only with materials of knowledge; it is thinking that makes what we read ours.

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.

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

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

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

I had rather excel others in the knowledge of what is excellent, than in the extent of my power and dominion

Action not backed by knowledge and knowledge not translatable into action, both can not stand the test of time.

It is beyond a doubt that all our knowledge begins with experience.

If one cannot enjoy reading a book over and over again, there is no use in reading it at all.

Courage, conviction and confidence.

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.

An investment in knowledge pays the best interest.

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

They say a little knowledge is a dangerous thing, but it's not one half so bad as a lot of ignorance.

It is what you read when you don't have to that determines what you will be when you can't help it.

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

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

What sculpture is to a block of marble, education is to a human soul.

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.

If the facts don't fit the theory, change the facts.