We learn an art or craft by doing the things that we shall have to do when we have learnt it.

ἃ γὰρ δεῖ μαθόντας ποιεῖν, ταῦτα ποιοῦντες μανθάνομεν

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Original Citation

Aristotle. Ἠθικὰ Νικομάχεια, Ēthika Nikomacheia [Nicomachean Ethics]. c. 322 BC.

Current Citation

Aristotle. Nicomachean Ethics, translated by Terence Irwin. Hackett Publishing, 2019, bk. 2.