Jamieson, Fausset and Brown on 1 Timothy 6:17

17. Resuming the subject from above, 1Ti 6:5, 10. The immortality of God, alone rich in glory, and of His people through Him, is opposed to the lust of money (compare 1Ti 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," 1Ti 6:14.

high-minded--often the character of the rich (see Ro 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 (Pr 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 (Pr 10:22; 2Pe 1:3).

to enjoy--Greek, "for enjoyment." Not that the heart may cleave to them as its idol and trust (1Ti 4:3). Enjoyment consists in giving, not in holding fast. Non-employment should be far removed, as from man, so from his resources (Jas 5:2, 3) [Bengel].