To measure up to all that is demanded of him, a man must overestimate his capacities

A man's foibles are what makes him lovable.

Man knows himself only insofar as he knows the world, becoming aware of it if only within himself, and of himself self only within it. Each new subject, well observed, opens up within us a new organ of thought.

As soon as any one belongs to a narrow creed in science, every unprejudiced and true perception is gone.

We are not all equal, nor can we be so.

Lord Byron is only great as a poet; as soon as he reflects he is a child.

The greater part of all the mischief in the world arises from the fact that men do not sufficiently understand their own aims.