What did God inspire David to write about war and peace in the book of Psalms? What are the principles to apply to live peaceful lives? Does God approve of man’s wars? No way. God hates the violent man. Peace is a blessing from God, while war is a curse. But in order to have peace, we must want to obtain it, and we must live peaceably ourselves. Wars start in the carnal heart of man, and it takes a change of heart to have peace. This means, that we need to meditate over our lives, to be able to recognize and to repent of our sins that separate us from God. We must ask God to reveal to us our secret sins.