Growing older

I don't know when we grow up. I do not know when I become alone in this life full of sorrow and happiness.We can't understand when what happens. But is this the life that is born today and old tomorrow?I believe that every moment learns something new, we have something new in every moment.Because of this I want to say that live every moment freely and try to learn something in every moment. this is life . born today and old tomorrow .