JMNT(i)
28 Now we [other MSS: you folks], brothers (= fellow believers; = my family), down from (or: corresponding to; in the sphere of) Isaac, are (continuously exist being) children of Promise (or: ones-born of [the] Promise).
29 But nevertheless, just as then, the one being born down from (in accordance with; corresponding to; on the level of) flesh (= human efforts) was constantly pursuing and persecuting the one down from (in accordance with; corresponding to; in the sphere of) spirit (or: Breath-effect), so also now.