Charles Ellicott Commentary 2 Corinthians 8:6

"Insomuch that we exhorted Titus, that as he made a beginning before, so he would also complete in you this grace also." — 2 Corinthians 8:6 (ASV)

Insomuch that we desired Titus . . .—The sequence of events seems to have been this: When Titus came to Corinth, he, among other things, after seeing the satisfactory results of the First Epistle in other respects, had begun to take measures for this collection for the poor of Jerusalem. He had been, to a certain extent, successful. Encouraged by the report of that success, St. Paul had now entreated Titus to return to Corinth, and to bring the good work to its completion.

“This grace also” practically means—this work of liberality, as well as that of repentance and loyal obedience already spoken of in 2 Corinthians 7.