There are four major seasons of life. Each of these have fundamentally different challenges and opportunities. The season is inevitable because our lives are not static but constantly changing.
As life changes, so do all of the details that affect our daily living. Just as the weather patterns change in predictable ways, our experience will follow predictable patterns. These seasons of life must be understood in order to adapt properly to them.
Read the article entitled Seasons of Life" to get a general overview.