To be partakers of the inheritance (εἰς τὴν μερίδα τοῦ κλήρου).
Lit., for the portion of the lot; that is, the portion which is the lot. Compare Act 8:21, where the two words are coordinated.
In light (ἐν τῷ φωτί)
Connect with inheritance: the inheritance which is in light. This need not be limited to future glory. The children of God walk in light on earth. See Joh 3:21; Joh 11:9; Joh 12:36; Eph 5:8; 1Th 5:5; 1Jo 1:7; 1Jo 2:10.