ISB ~ 2 Peter 1 v2

May grace and peace:The identical formula appears in 1 Pet 1:2 but nowhere else in the NT. In general, however, opening wishes of grace and peace are standard in early Christian letters (Rom 1:7; Phil 1:2; Rev 1:4).

knowledge:A key concept of the letter (1:3, 8; 2:20; 3:18). Growth in knowledge means increasing our understanding of God’s ways and deepening our relationship with him. True knowledge is emphasized because false knowledge was beginning to seep into the Christian community (2:1-3; 3:17).