Jamieson, Fausset and Brown on 2 Peter 1:5

5. And beside this--rather, "And for this very reason," namely, "seeing that His divine power hath given unto us all things that pertain to life and godliness" (2Pe 1:3).

giving--literally, "introducing," side by side with God's gift, on your part "diligence." Compare an instance, 2Pe 1:10; 2Pe 3:14; 2Co 7:11.

all--all possible.

add--literally, "minister additionally," or, abundantly (compare Greek, 2Co 9:10); said properly of the one who supplied all the equipments of a chorus. So accordingly, "there will be ministered abundantly unto you an entrance into the everlasting kingdom of our Saviour" (2Pe 1:11).

to--Greek, "in"; "in the possession of your faith, minister virtue. Their faith (answering to "knowledge of Him," 2Pe 1:3) is presupposed as the gift of God (2Pe 1:3; Ep 2:8), and is not required to be ministered by us; in its exercise, virtue is to be, moreover, ministered. Each grace being assumed, becomes the stepping stone to the succeeding grace: and the latter in turn qualifies and completes the former. Faith leads the band; love brings up the rear [Bengel]. The fruits of faith specified are seven, the perfect number.

virtue--moral excellency; manly, strenuous energy, answering to the virtue (energetic excellency) of God.

and to--Greek, "in"; "and in (the exercise of) your virtue knowledge," namely, practical discrimination of good and evil; intelligent appreciation of what is the will of God in each detail of practice.