in Thoreau’s Journal:

My life will wait for nobody, but is being matured still irresistibly while I go about the streets and chaffer with this man and that to secure it a living. It will cut its own channel, like the mountain stream, which by the longest ridges and by level prairies is not kept from the sea finally. So flows a man’s life, and will reach the sea water, if not by an earthy channel, yet in dew and rain, overleaping all barriers, with rainbows to announce its victory. It can wind as cunningly and unerringly as water that seeks its level; and shall I complain if the gods make it meander?