About Newton: Nature to him was an open book, whose letters he could read without effort.

There is an atmosphere of well-sounding oratory that likes to attach itself to dress clothes. Away with it!

You ask me if I keep a notebook to record my great ideas. I've only ever had one.

What is essential in the life of a man of my kind is what he thinks and how he thinks, and not what he does or suffers.

It is impossible to solve significant problems using the same knowledge that created them.

Those who have an interest in keeping the machinery of war going will stop at nothing to make public opinion subservient to their murderous ends.

I always found I was in the best of company, alone.