"Gaius, who is host to me and to the whole church here, greets you. So do Erastus, the city treasurer, and our brother Quartus." (Rom.16:23, Amplified Bible).
Paul was naming some special people God had used in his life in this tremendous final chapter of Romans, & he had said something specific about just about all of them, & then comes this man, Quartus. As far as I know, he is only mentioned this one time in all the Bible. The KJV simply says of him, "...& Quartus a brother." Some other translations of the Scriptures have Paul saying of him, "...Quartus the brother..." & the like. I am probably making far more out of this than is actually in the text, but something really neat just seems to be in Paul's mind as he mentions this brother in the Lord. Under divine inspiration, he doubtless had a good reason to include Quartus in this special list, & also to describe him in such simply sublime terms. I envision a humble believer who was just there for you if you had a need, & was so in tune with his Savior that he just radiated the joy of the Lord. I may be way off-base, but I don't think so. Paul had made the amazing yet true statement that without a single automobile or Internet or airplane, the Gospel had spread all over the then-known world! (see Col.1:23b) No doubt it was through the Spirit of Christ working through quiet, unassuming brothers & sisters who gladly presented their entire beings to the One who died for them & rose again. Oh, brothers & sisters, I'd like to be a brother like ol' Quartus, wouldn't you?