Respectfully Quoted: A Dictionary of Quotations. 1989.
Through this toilsome world, alas! Once and only once I pass; If a kindness I may show, If a good deed I may do To a suffering fellow man, Let me do it while I can. No delay, for it is plain I shall not pass this way again.
Author unknown, I Shall Not Pass This Way Again.The Best Loved Poems of the American People, ed. Hazel Felleman, p. 77 (1936).