Lie down among the pines for a while, then get to plain pure white love-work … to help humanity and other mortals and the Lord.

letter to Mrs. J.D. Hooker (19 September 1911); published in The Life and Letters of John Muir (1924), chapter 17, II; and in John Muir's Last Journey, edited by Michael P. Branch (Island Press, 2001), page 67