What does it mean to be an adult? It’s a straightforward question evading simple answers. In a clear and definitive tone, the Baltimore Catechism tells us that God made us to know Him, love Him, and serve Him in this world; and to be happy with Him forever in the next. If this is our intended telos, then surely human maturity—that is, adulthood—must take up the tasks of knowing, loving and serving God in a way that corresponds to a given individual’s abilities and situation. This four-part series, then, first takes up the question of what adulthood means, then takes up the idea of knowing God (through education), loving and serving Him (through worship and the states of life) and eternal beatitude (holiness being the ultimate expression of human maturity!).