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

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

The only true wisdom is in knowing you know nothing.

All stable processes we shall predict. All unstable processes we shall control.

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

Dare to think for yourself.

I cannot live without books.

Learn as though you would never be able to master it; hold it as though you would be in fear of losing it.

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

The whole of science is nothing more than a refinement of everyday thinking.

Better know nothing than half-know many things.

Books are for people who wish they were somewhere else.

There is nothing more awful, insulting, and depressing than banality.

Industrialize or perish.

A child miseducated is a child lost.

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

Knowledge, Action, Devotion are complementary to each other.

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

Reading without reflecting is like eating without digesting.

Knowing is not enough; we must apply. Willing is not enough; we must do.

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