30. young men—literally, "those selected"; men picked out on account of their youthful vigor for an enterprise.

     31. mount up— (2Sa 1:23). Rather, "They shall put forth fresh feathers as eagles" are said to renovate themselves; the parallel clause, "renew their strength," confirms this. The eagle was thought to moult and renew his feathers, and with them his strength, in old age (so the Septuagint, Vulgate, Ps 103:5). However, English Version is favored by the descending climax, mount up—run—walk; in every attitude the praying, waiting child of God is "strong in the Lord" (Ps 84:7; Mic 4:5; Heb 12:1).

     14. Translate as Greek, "And that (Php 1:13) most of the brethren in the Lord," &c. "In the Lord," distinguishes them from "brethren after the flesh," Jewish fellow countrymen. ELLICOTT translates, "Trusting in the Lord."