World Wide Study Bible
a Bible passage
29. That no flesh should glory Though the term flesh here, and in many passages of Scripture, denotes all mankind, yet in this passage it carries with it a particular idea; for the Spirit, by speaking of mankind in terms of contempt, beats down their pride, as in Isaiah 31:3 — The Egyptian is flesh and not spirit It is a sentiment that is worthy to be kept in remembrance — that there is nothing left us in which we may justly glory. With this view he adds the expression in God’s presence For in the presence of the world many delight themselves for the moment in a false glorying, which, however, quickly vanishes like smoke. At the same time, by this expression all mankind are put to silence when they come into the presence of God; as Habakkuk says —
Let all flesh keep silence before God, (Habakkuk 2:20.)
Let every thing, therefore, that is at all deserving of praise, be recognized as proceeding from God.