Quo semel est imbuta, recens servabit odorem testa diu. (For many a day the pot will keep the scent of that which first it held, when freshly baked.) "Train up a child in the way he should go; and when he is old, he will not depart from it' (Prov. 22:6).
Taken from the book The Mystery of Providence by John Flavel 1678