 Official witnesses of what he has done in this creation. And more important than anything else is that God has redeemed this creation. And how did he do that? Through the death and resurrection of the Son of God. The resurrection is so key that if there was no resurrection, nothing else that Jesus did matters. Because if there's no resurrection, he's either a liar or a lunatic. Shouldn't pay attention to any of it. But if he rose, he is Lord.