Gaius my host, and of the whole church, greets you. Erastus the treasurer of the city greets you, and Quartus a brother.
Read Chapter 16
Ambrosiaster
AD 400
I think that this is the same Gaius to whom John wrote rejoicing in the love which he showed to the brethren by being always ready to meet their needs. Commentary on Paul’s Epistles.
When you hear that Gaius was Paul’s host, admire him not only for his generosity but also for his strictness of life. For if he were not worthy of Paul’s standards, the apostle would never have lodged there. Paul mentions Erastus’s title with the purpose of showing that the gospel had taken hold among the great as well as among the rest of the population…. To a man who hears the Word, riches are not a hindrance, nor the cares of government, nor anything else of that kind.
