Thinking Thursday: Advice

I found this poem in a book of fiction. It is called Advice, and I think it is very good advice. Let me know what you think.

If they are cruel, be kind.
If they are mean, don't mind.
If they reject, don't fret.
If they insult, forget.
If they exclude, love still.
If you cannot, God will.
If you lose hope, just wait.
Don't hate.