3 John 1:5

Beloved, thou doest a faithful work in whatsoever thou doest toward them that are brethren and strangers withal;

Beloved ... Note the transition to the section praising Gaius for his hospitality.

Thou doest ... doest ... "The second of these verbs is different from the first in the Greek, and implies more of toilful labor."[17] What is in view here is the marvelous hospitality of Gaius extended to traveling brethren who were spreading the gospel; and the words "strangers withal" show that he did not merely entertain those with whom he was personally acquainted. There were good solid reasons why traveling preachers of that day depended upon faithful brethren such as Gaius for their maintenance. The scarcity of inns, the disreputable character of such inns as were available, and the general poverty of many Christians contributed to this necessity.