Not slothful in business; this clause may be expounded by Ecc_9:10: q.d. In all the duties of thy particular and general calling, in every thing that respects the glory of God, thine own or neighbours’ good, take heed of slothfulness: see Mat_25:26,27 Heb 6:12.
Fervent in spirit; this is added to the former, as the cure of it. Zeal and fervency will drive away sloth. This spiritual warmth is often recommended to us in Scripture; see Gal_4:18Rev_3:19. See examples of it in Psa_69:9Joh_2:17 4:34 Act_18:25.
Serving the Lord; i.e. diligently performing all things that are required to his service and honour: see Psa_2:11Eph_6:7. Some copies read it, serving the times, in such a sense as it is in Eph_5:16, and Col_4:5.