Human behavior flows from three main sources: desire, emotion, and knowledge

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

The knowledge of all things is possible

Education is the kindling of a flame, not the filling of a vessel.

The direction in which education starts a man will determine his future in life

Many much-learned men have no intelligence.

What is now proved was once only imagined.

Knowledge becomes evil if the aim be not virtuous.

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

Opinion is the medium between knowledge and ignorance.

The ability to observe without evaluating is the highest form of intelligence.

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

There is one quality which one must possess to win, and that is definiteness of purpose, the knowledge of what one wants, and a burning desire to possess it.

Education is the most powerful weapon which you can use to change the world.

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

Imagination is more important than knowledge.

We could never learn to be brave and patient, if there were only joy in the world

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

Words can be like X-rays if you use them properly - they'll go through anything. You read and you?re pierced.

Courage, conviction and confidence.

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