Matthew 10:40
40“He who receives you receives me, and he who receives me receives him who sent me.
Chain of reception: you → Me → the Father. How people treat messengers is how they treat God.
Welcome the gospel’s servants sincerely. The offer of Christ arrives in human faces; receiving them is a response to grace.
Identification theology: apostles represent Christ; Christ represents the Sender. Hospitality becomes liturgy of recognition.
Union with Christ and mission meet in this verse. God has so bound Himself to His sent ones that reception of them is reception of Him.