Why did Pythagoras compare the periods of a person’s life with the seasons?

In my opinion, it looks completely logical when a person’s life is compared with the seasons. It turns out that in the spring everything blooms, this is the period of childhood and growing up. In summer it is warm, as comfortable as possible, everything grows, ripens. This is a period of courage, maximum flowering of forces. In the fall, we reap the fruits that have ripened in the summer, it gets colder, things are moving towards winter. In the third period, the strength of a person leaves every year, the body is aging. In the fourth period, a person is completely old and lives out his life, it is winter.