All science is the search for unity in hidden likenesses.

All science is the search for unity in hidden likenesses.

The world can only be grasped by action, not by contemplation.

The child is not a prisoner of its inheritance; it holds its inheritance as a new creation which its future actions will unfold.

Dissent is the native activity of the scientist, and it has got him into a good deal of trouble in the last years. But if that is cut off, what is left will not be a scientist. And I doubt whether it will be a man.

Whether our work is art or science or the daily work of society, it is only the form in which we explore our experience which is different.

The values by which we are to survive are not rules for just and unjust conduct, but are those deeper illuminations in whose light justice and injustice, good and evil, means and ends are seen in fearful sharpness of outline.