The great difficulty in education is to get experience out of ideas.

Medicine is my lawful wife and literature my mistress; when I get tired of one, I spend the night with the other.

I am a part of everything that I have read.

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

Don't learn to do, but learn in doing.

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

Knowledge, Action, Devotion are complementary to each other.

Better know nothing than half-know many things.

Courage, conviction and confidence.

Opinion is the medium between knowledge and ignorance.

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.

I have no special talents. I am only passionately curious.

Imagination is more important than knowledge.

Common sense is the collection of prejudices acquired by age eighteen.

Although modesty is natural to man, it is not natural to children. Modesty only begins with the knowledge of evil.

That men do not learn very much from the lessons of history is the most important of all the lessons that history has to teach.

Education is a human right with immense power to transform. On its foundation rest the cornerstones of freedom, democracy and sustainable human development.

Study hard what interests you the most in the most undisciplined, irreverent and original manner possible.

Books are for people who wish they were somewhere else.

Science is what we have learned about how to keep from fooling ourselves.