Jamieson, Fausset and Brown on 1 Timothy 6:18

18. do good--like God Himself (Psa 119:68; Ac 14:17) and Christ (Ac 10:38). Tittmann translates, "to do," or "act well"; as the Greek for "to be beneficent" is a distinct word, agathopoiein.

rich in good works--so "rich in faith," which produces good works (Jas 2:5). Contrasted with "rich in this world," 1Ti 6:17. Literally, it is "rich in honorable (right) works." Greek, "kalois," "ergois," are works good or right in themselves: "agathois," good to another.

ready to distribute--free givers [Alford]; the heart not cleaving to possessions, but ready to impart to others.

willing to communicate--ready contributors [Alford]: liberal in admitting others to share our goods in common with ourselves (Ga 6:6; He 13:16).