O life! An age to the miserable, a moment to the happy.

Photographs are not only points of reference... they're often triggers of ideas.

The joys of parents are secret, and so are their grieves and fears.

If any human being earnestly desire to push on to new discoveries instead of just retaining and using the old; to win victories over Nature as a worker rather than over hostile critics as a disputant; to attain, in fact, clear and demonstrative knowlegde instead of attractive and probable theory; we invite him as a true son of Science to join our ranks.

There is little friendship in the world, and least of all between equals.

In things that are tender and unpleasing, it is good to break the ice by some one whose words are of less weight, and to reserve the more weighty voice to come in as by chance.

The job of the artist is always to deepen the mystery.