It is good that he should have his pupil trot before him, to judge the child’s pace and how much he must stoop to match his strength. For lack of this proportion we spoil everything; and to be able to hit it right and to go along in it evenly is one of the hardest tasks that I know; it is the achievement of a lofty and very strong soul to know how to come down to a childish gait and guide it. I walk more firmly and surely uphill than down.
—Michel de Montaigne (cf. Cicero)