Horace Greeley is emphatically a self-made man, and he worships his Creator!
Source, in full
Attributed to Clapp in Harper's New Monthly Magazine, vol. 37, no. 218 (July 1868) p. 283. Said also by John Bright of Disraeli. Variation in Kate Louise Roberts (ed.) Hoyt's New Cyclopedia of Practical Quotations (1922) p. 488: "A self-made man? Yes — and worships his creator."