When we accept any discipline for ourselves, we try to avoid everything except that which is necessary for our purpose; it is this purposefulness, which belongs to the adult mind, that we force upon school children. We say, "Never keep your mind aler.
Discipline divorced from wisdom is not true discipline, but merely the meaningless following of custom, which is only a disguise for stupidity.
Work, especially good work, becomes easy only when desire has learnt to discipline itself.