Folly is bound up in the heart of a child, but the rod of discipline will drive it far away.
OJBFolly is bound in the lev na'ar, but the shevet musar (rod of correction) shall drive it far from him.
T4TChildren [SYN] naturally do things that are foolish, but if you punish/spank them [PRS], they will ◄stop doing foolish things/learn to behave as they should►.