Harry Emerson Fosdick1878–1969- Often credited to Benjamin Franklin
- Riverside Sermons (1958), p. 22
- Living Under Tension (1941), p. 111
- Statement of 1937 or earlier, as quoted in The New Speaker’s Treasury of Wit and Wisdom (1958) edited by Herbert Victor Prochnow
You can know a real Christian when you see him, by his buoyancy.
Twelve Tests of Character (1923)- On Being a Real Person (1943)
- On Being Fit to Live With: Sermons on Post-War Christianity (1946)





