Who are the people who are after the flesh?
Those after the flesh are people still living in the realm of old Adam, knowing nothing of God's saving grace. They mind the things of the flesh, comprising the grand majority of the world's population, concerned only with gratifying the flesh and having no concept of eternity or spiritual things.
Les explains that those after the flesh are still living in the realm of old Adam and know nothing of God's saving grace. He notes they mind the things of the flesh, and this describes the grand majority of the world's population. Their sole focus is to gratify the flesh, with no concept of eternity or spiritual things. Even if done with pomp and circumstance or in high echelons of society, it remains nothing but the gratification of the flesh.
For they that are after the flesh do mind the things of the flesh; but they that are after the Spirit the things of the Spirit.