A.T. Robertson Commentary 2 Peter 1:5

"Yea, and for this very cause adding on your part all diligence, in your faith supply virtue; and in [your] virtue knowledge;" — 2 Peter 1:5 (ASV)

Yea, and for this very cause (κα αυτο τουτο δε). Adverbial accusative (αυτο τουτο) here, a classic idiom, with both κα and δε. Cf. κα τουτο , τουτο μεν--τουτο δε (Hebrews 10:33). "The soul of religion is the practical part" (Bunyan). Because of the new birth and the promises we have a part to play.

Adding on your part (παρεισενεγκαντες). First aorist active participle of παρεισφερω, old double compound, to bring in (εισφερω), besides (παρα), here only in N.T.

All diligence (σπουδην πασαν). Old word from σπευδω to hasten (Luke 19:5f.). This phrase (πασαν σπουδην) occurs in Jude 1:3 with ποιουμενος and on the inscription in Stratonicea (verse 3) with ισφερεσθα (certainly a curious coincidence, to say the least, though common in the Koine).

In your faith (εν τη πιστε υμων). Faith or πιστις (strong conviction as in Heb 11:1,3, the root of the Christian life Eph 2:8) is the foundation which goes through various steps up to love (αγαπη). See similar lists in Jas 1:30; 1 Thessalonians 1:3; 2 Thessalonians 1:3f.; Galatians 5:22f.; Romans 5:3f.; 8:29f. Hermas (Vis. iii. 8. 1-7) has a list called "daughters" of one another. Note the use of εν (in, on) with each step.

Supply (επιχορηγησατε). First aorist active imperative of επιχορηγεω, late and rare double compound verb (επ and χορηγεω 1 Peter 4:11 from χορηγος, chorus-leader, χορος and ηγεομα, to lead), to fit out the chorus with additional (complete) supplies. Both compound and simplex (more common) occur in the papyri. In 1:11 and already in 2 Corinthians 9:10; Galatians 3:5; Colossians 2:19.

Virtue (αρετην). Moral power, moral energy, vigor of soul (Bengel). See 3.Knowledge (γνωσιν). Insight, understanding (1 Corinthians 16:18; John 15:15).