person A: Our daughters are growing up so fast on us. They are now 18 and almost 16.  I think you blink and the years just fly by.
person B: Yes i agree.  I have 3 boys and they are in their twenties. I don't know where the years went.
person A: I'm slowly learning that life is all about changing and it's changing more rapidly than I'd like.  I catch myself on a daily basis remembering things that have already gone on by.
person B: That's so true! I have a theory that time is just a way to keep everything from happening at once. 