Show hospitality to God's servant is work together for the truth

3 John 1:1-8
Faithfulness to the truth and how your continue to walk in the truth.
It was for the sake of the Name that they went out, receiving no help from the pagans.
We ought therefore to show hospitality to such men so that we may work together for the truth.
This is a personal letter from the Elder to his friend Gaius. The name was a common on at the time, and there is noting to connect this Gaius with any of the others mentioned in the New Testament. If tradition is anything to go by, he may have been a leader of the church at Pergamum. More importantly, Gaius was a man who 'lived in the truth'. His life and conduct are in striking contrast to that of another local leader, Diotrephes. Gaius, a man of integrity, is doing all in his power to help his fellow Christians, especially  the travelling evangelists and teachers who depended on Christian hospitality and support.
Why?
Gaius show hospitality to missionary for God was traveler in the world, he give all to us, so we obey his command and continue his mission to preach gospel. Christian walk in the truth should give help to the missionary as we can for we received good news free.
No only worship God or doing work in church is spiritual service to the Lord, but show hospitality is work together for the truth, work for the Lord.
How?
Caring people and brothers in health and his living and spiritual life is my obligation.