Jamieson, Fausset & Brown

And--omitted in the oldest manuscripts (compare Eph 6:7-8). Compare the same principle in the case of all men, Hezekiah (Ch2 31:21; Rom 12:11). do, do it--two distinct Greek verbs, "Whatsoever ye do, work at it" (or "labor at" it). heartily--not from servile constraint, but with hearty good will.