The purpose of life is living. Men and women should get the most they can out of their lives. The smallest, tiniest intellect may be quite as valuable to society as the largest. It may be still more valuable to itself: it may have all the capacity for enjoyment that the wisest has. The purpose of man is like the purpose of the pollywog — to wriggle along as far as he can without dying; or to hang on until death takes him.

As quoted in Infidels and Heretics : An Agnostic's Anthology (1929) edited by Clarence Darrow and Wallace Rice, pp. 206 - 207