Nothing in life is to be feared. It is only to be understood.

Be less curious about people and more curious about ideas.

There are sadistic scientists who hurry to hunt down error instead of establishing the truth.

One never notices what has been done; one can only see what remains to be done . . .

Life is not easy for any of us. But what of that? We must have perseverance and above all confidence in ourselves. We must believe that we are gifted for something and that this thing must be attained.