ISB ~ Ephesians 1 v3

in Christ:A description of our union with Jesus through grace. Similar expressions of incorporation punctuate the letter and culminate in Paul’s vision of Christ as the “head” of his mystical “body”, the Church (1:22-23; 2:16; 5:23).

the heavenly places:i.e., the spiritual realm where believers sit enthroned with Christ (1:20; 2:6) and where angels and demons move about unseen (3:10; 6:12). See note on Eph 2:6.