(The life and letters of John Angell James)

If you are parents, let your profession lead you to instruct your children in the fear of God, especially by the impressive admonition of a good example. Be very attentive to the spiritual education of your children — let them neither hear nor see anything in you which would hinder true religion. Example is more powerful than precept. It is vain to teach them religion by your words — unless you show it to them by your actions.

Teach them to obey you.
Be firm, but mild.
Govern them in love.
Subdue them by kindness.