The highest activity a human being can attain is learning for understanding, because to understand is to be free.

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

For a successful technology, reality must take precedence over public relations, for Nature cannot be fooled.

It is possible to fly without motors, but not without knowledge and skill.

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

Education is our passport to the future, for tomorrow belongs to the people who prepare for it today.

Education is the best friend. An educated person is respected everywhere. Education beats the beauty and the youth.

Seek knowledge from the cradle to the grave.

You can never be overdressed or overeducated.

It is not enough for the teacher to love the child. She must first love and understand the universe. She must prepare herself, and truly work at it.

I am so clever that sometimes I don't understand a single word of what I am saying.

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

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.

I am a part of everything that I have read.

Real knowledge is to know the extent of one's ignorance.

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

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

Knowledge becomes evil if the aim be not virtuous.

Any knowledge that doesn't lead to new questions quickly dies out: it fails to maintain the temperature required for sustaining life.

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

I cannot teach anybody anything. I can only make them think