Time is going like a river as you going with. At the teenage you run to catch up with it. At the young age your responses make it hard for you to run, so you walk. But at the age of the oldness is time to have rest. So you stop and you are too tired to swim through the time line. Then you look back for the first time to see the whole way you passed with all the things that you remind and you looking for some reason to satisfy yourself that you didn’t wasted your life that you reached what you tried for. But if you couldn’t, then you leave your life as it’s incomplete because that reason for you is like that last part of your life puzzle.
My dear friend; be careful about choosing your purpose in life. For the first think about what you want from your life then choose your way. because when you choose it, you will go with it to the END.
I was trying to change it into idiomatic English, which none of the original is.