Jamieson, Fausset & Brown, on 1Tim 6:17

Resuming the subject from above, Ti1 6:5, Ti1 6:10. The immortality of God, alone rich in glory, and of His people through Him, is opposed to the lust of money (compare Ti1 6:14-16). From speaking of the desire to be rich, he here passes to those who are rich: (1) What ought to be their disposition; (2) What use they ought to make of their riches, and, (3) The consequences of their so using them. rich in this world--contrasted with the riches of the future kingdom to be the portion of believers at Christ's "appearing," Ti1 6:14. high-minded--often the character of the rich (see Rom 12:16). trust--Greek, "to have their trust resting." in . . . in--rather, "upon . . . upon," as the oldest manuscripts. uncertain riches--rather as Greek, "the uncertainty of riches." They who rest their trust on riches, rest trust on uncertainty itself (Pro 23:5). Now they belong to one person, now to another, and that which has many masters is possessed by none [THEODORET]. living God--The best manuscripts and versions omit "living." He who trusts in riches transfers to them the duty he owes to God [CALVIN]. who giveth--Greek, "affordeth." all things richly--temporal and eternal, for the body and for the soul. In order to be truly rich, seek to be blessed of, and in, God (Pro 10:22; Pe2 1:3). to enjoy--Greek, "for enjoyment." Not that the heart may cleave to them as its idol and trust (Ti1 4:3). Enjoyment consists in giving, not in holding fast. Non-employment should be far removed, as from man, so from his resources (Jam 5:2-3) [BENGEL].