If you neglect to instruct [children] in the way of holiness, will the devil [and the world and their own nature] neglect to instruct them in the way of wickedness? No; if you will not teach them to pray, he will to curse, swear, and lie. If ground be uncultivated, weeds will spring.
The Whole Works of the Reverend John Flavel, vol. 4 (London: W. Baynes and Son, 1820), 374.