The truth of heaven is causality. Good thoughts and actions result in joy in the future, while evil (greed, arrogance, and self love) thoughts and action results in suffering in the future. We reap what we sow. Sometimes what we reap comes in the next life (reincarnation), which makes the relationship between cause and effect difficult to understand.
Until the world understands the concept of causality, we will continue to blame others for our sufferings and inconveniences. The selfish will continue to take advantage of others, the strong will continue to abuse the weak, and the righteous will continue to infringe the rights of others. With these evil thoughts and actions, besides causing suffering to others, we are hurting ourselves.
It is this message of causality that we spread to the world. It is with our special prayer that we ask God to help people realize the truth of heaven. When all mankind understands causality, the world will experience true joy, with everyone help each other.