Human Life: A Cycle?

I do not believe that human life is like a cycle. We are faced with new experiences everyday. These small everyday things contribute to our growth as a whole.  I think human life is more like a mountain climb. When we are young, we are climbing up the hill. We get grow and get stronger each day. There may be obstacles on our road to the top of the mountain, but once we overcome them, we are one step closer in reaching the top. This is just like our life. There are just some times in our life that we will face difficulties and have a hard time moving forward, however, if we keep at what we do, the challenges will eventually pass. I believe we get to the top of that mountain at in our 20s and 30s. This is when out body is the strongest. This is also the point when most people begin a new life as an individual and not under the care of their parents. After we pass the peak, it gets to the downhill. Our body functions may weaken. We become more likely to forget things. By the end of the mountain climb, life ends. We have left a trail on the life mountain we climbed. After that, it is time to take a rest.