Lately I've been focusing these thoughts on people. I know that specific people are placed in our lives for a reason. I love the lyrics to the song "For Good" from Wicked:
I've heard it said that people come into our lives for a reason,
bringing something we must learn,
and we are led to those who help us most to grow if we let them.
And we help them in return.
Well I don't know if I believe that's true,
but I know I'm who I am today because I knew you.
....Who can say If I've been changed for the better?
I do believe I have been changed for the better.
Because I knew you I have been changed for good.