ἃ γὰρ δεῖ μαθόντας ποιεῖν, ταῦτα ποιοῦντες μανθάνομεν → what we have to learn to do we learn by doing
P. and V. ἥσυχος, ἡσυχαῖος, P. ἡσύχιος; see calm.
