Even though this might be difficult for us to understand, God does indeed suffer and experience mental pain when He sees that we suffer. Every loving father or brother would feel mental anguish when he observes that his children or brethren suffer innocently or because they go the wrong way and inflict pain upon themselves as a consequence. Even more so, God the Father and Jesus Christ the Son--the firstborn among many brethren--suffer when they see that we experience pain and anguish and despair.
"You are the light of the world. A city that is set on a hill cannot be hidden."
-Matthew 5:14