“A good teacher will arm you with the tools to dispute their conclusions.”
Source: https://twitter.com/thestoicemperor/status/1292585452478672896
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Original in Italian:
ho trovato nel vostro libro la conferma delle mie ultime conclusioni e gli strumenti per approfondire questo as petto della questione artistica.
In a letter to Jacques Maritain, 18 September, 1923; as quoted in: Justine Grace, 'The Spirit of Collaboration: Gino Severini, Jacques Maritain, Anton Luigi Gajoni and the Roman Mosaicists' http://artsonline.monash.edu.au/colloquy/download/colloquy_issue_twenty-two/grace.pdf, COLLOQUY text theory critique Vol 22 (2011).

1994, p. 45
Integrity in Science (1985)

“You will not be good teachers if you focus only on what you do and not upon who you are.”

No one has said that about a great teacher. That's not what people remember about the great teachers they've had.
2000s, Global Ideas from Pluto's Challenger (May 21, 2009)
“A good teacher must know the rules; a good pupil, the exceptions.”
Fischerisms (1944)

“Reading is a basic tool in the living of a good life.”
Misattributed