Whereby are given unto us exceeding great and precious promises: that by these ye might be partakers of the divine nature, having escaped the corruption that is in the world through lust. Whereby - By which glory and virtue: His glory making the "promises" exceeding great; His virtue making them "precious" (Bengel). Precious promises are the object of precious faith.
Given. The promises themselves are a gift; for they are as sure as if fulfilled. By these - promises. They even now have a sanctifying effect, assimilating the believer to God. Still more so when fulfilled.
Might, х geneesthe (G1096)] - 'that ye MAY become partakers,' now in part, hereafter perfectly (1 John 3:2).
Of the divine nature - not God's essence, but His holiness, holiness, including His "glory" and "virtue" (2 Peter 1:3): opposite to 'corruption through lust.' Sanctification is the imparting of God Himself by the Holy Spirit in the soul. We by faith partake also of the material nature of Jesus (Ephesians 5:30). The "divine power" enables us to be partakers of the "divine nature."
Escaped the corruption - which involves in itself destruction of soul and body. (On "escaped," as from a condemned cell, cf. Genesis 19:17; Colossians 1:13; 1 Peter 2:18-20.)
Through, х en (G1722)] - 'IN.' 'The corruption in the world' has its seat, not so much in the surrounding elements, as in the "lust" of men's hearts.