Gaius, the man John was writing to, was a godly man who believed what the apostles taught.  He had not embraced false teaching, and his faith was commended by John (3 John 1:3).  Now we discover that, like the Lady in 2 John, Gaius had a wonderful ministry of hospitality.  The churches were growing fast, partly because they appointed suitable people to be sent out as missionaries to preach the gospel and plant new churches (Acts 13:2-3).

Those missionaries went because they believed in Jesus and proclaimed His Name (His divinity, character and ministry - especially His death and resurrection) so that many more might believe.  As they went out they 'travelled light', following the instructions of Jesus (Mark 6:8-10).  They received no help from unbelievers but certainly needed food, shelter and loving fellowship.  Gaius wanted to help and willingly accommodated them, even though they were strangers to him.

The churches heard of this man's loving generosity, and they rejoiced that the Lord had used Gaius, his home and his money.  John knew that such a vital ministry could falter if not encouraged, and so he affirmed Gaius saying that he was doing the right things.  John urged him to ensure that the missionaries had a generous supply of what they needed when they went on their way.  The ministry of hospitality was and is an essential part of the whole mission of the gospel (Hebrews 13:2).

Why should we refuse to be hospitable to bona fide believers who are on mission for Jesus' sake?  Yes, some people abuse the hospitality; but do not forget you are giving to God who knows your heart.  It should be given willingly and generously, because God has already given so generously to us (2 Corinthians 8:10-15).  Never think that hospitality is a lesser ministry than others: it is essential to provide rest and refreshment.  Then God's servants can proclaim the gospel and teach believers how to live in a way which pleases Him.  Give God the key to your home; let Him bring people to you.  He will bless them and advance His gospel through your loving and generous service.