Women always worry about things that men forget; men always worry about things women remember.

He who can no longer pause to wonder and stand rapt in awe, is as good as dead; his eyes are closed.

It is only to the individual that a soul is given.

I urge a willingness to reserve a place in rational science for non-rational wonder.

Hope that justice will be done to those brave men who stood up for their convictions.

I am an absolute pacifist...It is an instinctive feeling. It is a feeling that possesses me, because the murder of men is disgusting.

My interest in science was always essentially limited to the study of principles.... That I have published so little is due to this same circumstance, as the great need to grasp principles has caused me to spend most of my time on fruitless pursuits.