From Parents and Children, Chapter VII:
What is discipline? Look at the word; there is no hint of punishment in it. A disciple is a follower, and discipline is the state of the follower, the learner, imitator. Mothers and fathers do not well to forget that their children are, by the very order of Nature, their disciples. Now no man sets himself up for a following of disciples who does not wish to indoctrinate these with certain principles, or at the least, maxims, rules of life. So should the parent have at heart notions of life and duty which he labours without pause to instill into his children.