The LORD was referring to all the people, even the prophets and priests, when He stated, ". . . .they have no shame at all; they do not even know how to blush" (Jeremiah 6:15b). The people had gotten so far away from God they had no shame.
America comes to mind. Have we no shame at all? Do we ever blush? The depths to which our morals (as a country) have fallen, cause many to have no shame about anything they do. Our country's standards may have changed, but God's remain the same. He remains unchanged. "Jesus Christ is the same yesterday and today and forever" (Hebrews 13:8). His commandments are still as applicable today as the day they were engraved on two tablets by God.
Prayer: Convict us Holy Spirit if we feel no shame when we sin against God. Lord, cause us to blush once again at the wrongs around us. Help us protect our eyes, ears and minds from anything that does not please you.