Today's Gospel, St. Luke 10:1-20, finds Jesus sending out the seventy in pairs into every city to which He Himself would come, even as Joshua sent a pair of spies to Jericho in advance of his own coming with an army. Rahab received the spies and was spared; the king sought to kill them and was destroyed. So also, Jesus says that whoever receives His disciples receives Him, and whoever does not receive them rejects Him and His Father. So also He warns of the coming of judgment to those who reject His messengers.
So today, the preachers of the Gospel bring Christ Himself, and He will Himself come again in glory as Judge: who has received His Gospel and messengers?