If you change the way you look at things, the things you look at change.
Things change. And friends leave. Life doesn't stop for anybody.
To live is to change, and to be perfect is to have changed often.
Well, I believe life is a Zen koan, that is, an unsolvable riddle. But the contemplation of that riddle - even though it cannot be solved - is, in itself, transformative. And if the contemplation is of high enough quality, you can merge with the divine.