'Of the Flesh' in the Bible

For that which was impossible for the law to do, and in which it was weak through the corruption of the flesh, God by sending his own Son in the likeness of sinful flesh to be a sacrifice for sin, hath done; that is, hath condemned sin in the flesh:

For they who are after the flesh, mind the things of the flesh; but they who are led by the Spirit, do mind spiritual things.

That is, not the children of the flesh are the children of God, but the children of the promise are accounted for the seed.