The wise in heart are called discerning, and pleasant words promote instruction. Proverbs 16:21 In Shepherding a Child’s Heart, Tedd Tripp identifies three age ranges in children. The first is from infancy to childhood (ages 0 to 5), next is childhood (from ages 5 to 12), and then the teenage years. There are, of course, significant differences within these ranges. A 9-month-old is different than a 5-year–old, and a 13-year-old is different than a 19-year-old. Yet these categories of ages are helpful. Each range marks a transition both in the development of the child and in the responsibility of the parents.