In Radical Grace, Richard Rohr posits that there are four ages of human life--well, he says men, but I'll say human life.
First is student time: learning from our elders. Second age is the "man/woman the bread winner," creating and living within a family unit. Rohr suggests that many people get "stuck" here in this age/stage/move/step, and sadly remain here for the rest of their life.
The third? Journeyer. Nomad. Accumulator of experiences from near and far. Pilgrim!
The fourth: the one who has gained experienced, only obtained through going through the other three ages.
Food for thought.