John Chrysostom : "And we have sent with them our brother." Behold, again he adds yet another, and him also with an encomium; both his own judgment, and many other witnesses [to him]. "Whom," saith he, "we have many times proved earnest in many things, but now much more earnest." And having praised him from his own good works, he extols him also from his love towards them; and what he said of Titus, that "being very earnest he went forth of his own accord;" this he says of this person also, saying, "but now much more earnest;" laying up beforehand for them the seeds of [the proof of their] love toward the Corinthians. — Homily 18 on 2 Corinthians Theodoret of Cyrus : Some people think this refers to Apollos, whom Paul promised in his first epistle that he would send.. — COMMENTARY ON THE SECOND EPISTLE TO THE CORINTHIANS 332