The greatest homage to truth is to use it.

In every company, there is not only the active and passive sex, but, in both men and women, a deeper and more important sex of mind, namely, the inventive or creative class of both men and women, and the uninventive or accepting class.

Nature does not cocker us: we are children, not pets: she is not fond: everything is dealt to us without fear or favor, after severe universal laws.

Friendship buys friendship.

If you criticize a fine genius, the odds are that you are out of your reckoning, and, instead of the poet, are censuring your owncaricature of him.

A man is related to all nature.

Of all tools, an observatory is the most sublime. . . . What is so good in a college as an observatory? The sublime attaches to the door and to the first stair you ascent, that this is the road to the stars.