“310. A pupil and a teacher. The pupil will not let anything be explained to him, for he continually interrupts with doubts, for instance as to the existence of things, the meaning for words, etc. The teacher says "Stop interrupting me and do as I tell you. So far your doubts don't make sense at all."”
On Certainty (1969)
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Ludwig Wittgenstein 228
Austrian-British philosopher 1889–1951Related quotes

“If you become a teacher, by your pupils you'll be taught.”
"Getting to Know You", The King and I (1956).
“What is liberal education,” p. 3
Liberalism Ancient and Modern (1968)

“Time is a great teacher, but unfortunately it kills all its pupils.”
Le temps est un grand maître, dit-on; le malheur est qu'il soit un maître inhumain qui tue ses élèves.
Letter written in November 1856, published in Pierre Citron (ed.) Correspondance générale (Paris: Flammarion, 1989) vol. 5, p. 390; Paul Davies About Time: Einstein’s Unfinished Revolution (New York: Simon & Schuster, 1996) p. 214.

“A teacher is frequently the only adult in the pupil's environment who treats him with respect.”
Part VI, ch. 29 (Samuel Bester)
Up the Down Staircase (1965)