{This Hagar} (	o Hagar). Neuter article and so referring
to the word Hagar (not to the woman, h(885c) Hagar) as applied to
the mountain. There is great variety in the MSS. here. The
Arabians are descendants of Abraham and Hagar (her name meaning
wanderer or fugitive). {Answereth to} (suntoichei). Late word
in Polybius for keeping step in line (military term) and in
papyri in figurative sense as here. Lightfoot refers to the
Pythagorean parallels of opposing principles (sunstoichiai) as
shown here by Paul (Hagar and Sarah, Ishmael and Isaac, the old
covenant and the new covenant, the earthly Jerusalem and the
heavenly Jerusalem). That is true, and there is a correlative
correspondence as the line is carried on.