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He who can, does. He who cannot, teaches.Shaw, George Bernard
Source: GEORGE BERNARD SHAW, Maxims for Revolutionists, appendix 2 to Man and Superman, in his Selected Plays with Prefaces, vol. 3, p. 733 . · GBS was actually talking about revolutionaries here - not teachers. In this context the shift is from teaching to contributing to the cause. · This quote is about teacher · Search on Google Books to find all references and sources for this quotation.
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