It is not enough to know what is good: you must be able to do it.
ATTRIBUTION:
George Bernard Shaw (1856–1950), Anglo-Irish playwright, critic. (1921). Zoo, in Back to Methuselah, act 1,”Tragedy of an Elderly Gentleman,” The Bodley Head Bernard Shaw: Collected Plays with their Prefaces, vol. 5, ed. Dan H. Laurence (1972).
