Our task in life has no greater enemy, and there is no greater cancer on our present state, than ignorance. Study Torah thoroughly—Torah, the Prophets, Ketuvim (Hagiographia), Talmud and decisors. And do not study out of a desire to be a rabbi. Study Torah as a businessman, a tradesman, an artist, a doctor, or a scientist.
Collected Writings, vol. 7, pp. 157 [Ges. Schrift., vol. 5, p. 225] in Torah Leadership for Our Times, Jewish Action