Charles Ellicott Commentary Colossians 1:8

"who also declared unto us your love in the Spirit." — Colossians 1:8 (ASV)

Who also declared to us.—This refers to news recently brought by Epaphras to St. Paul at Rome. He had been a minister in St. Paul’s place; he now, like Timothy afterwards, visited him to report on his delegated work.

Your love in the Spirit.—“In the Spirit” is “in the grace of the Holy Spirit”—the Spirit of love. The love here would seem to be especially love towards St. Paul, a part of the love towards all the saints ascribed to them above (Colossians 1:4).