Its premise is that God sends people into our lives for different periods of time to help us on our journey. People who come into our lives for a reason are there to meet a need at that time. Perhaps it is a difficult time, perhaps a time we need direction or purpose. We know these persons are there to help us at that moment. They come for that reason and then are gone.
Some people come into our lives for a season.
They bring us a new experience. They teach us something. They bring us joy. They inspire us, but they, too, move on. They teach us a lifetime of lessons.