Although it is not a poem as such, God made it easy to understand. You don't have to be a maths whiz.
Here is the word version: If you are angry and I am angry back at you, then the result is more anger. The only way to reduce anger is with love. A negative emotion is neutralised with a positive emotion.
When God is in your life, God adds love and therefore your anger will be reduced and your love increased. If God is not in your life then there is no change.
When you have no emotion or feelings, then you are unaffected.