I've seen many troubles in my time, only half of which ever came true.

It isn't so astonishing the number of things that I can remember, as the number of things that I can remember that aren't so.

I find that the further I go back, the better things were, whether they happened or not.

When I'm playful I use the meridians of longitude and parallels of latitude for a seine, and drag the Atlantic Ocean for whales. ... Life on the Mississippi

The work that is really a man's own work is play and not work at all.

Imaginary time is a new dimension, at right angles to ordinary, real time.