The Cross is man’s judgment
Men squander the earth and their own lives, but refuse to acknowledge the Maker of heavens and earth, even their lives; Men build alters and “high places” in their minds to satisfy their idolatrous hearts but deny Jesus precisely because of, not in spite of, Jesus’ “lowliness” of coming down from heaven to die for men’s sin.
Yet it is the very same men who are very certain they are morally justified and do not need God’s salvation. God will judge on that day everything man has done, but the condemnation needs not wait until men’s deepest secrets are revealed.
Instead, men will be condemned at the very moment the Cross is revealed to them. They will see the Cross and immediately understand why the condemnation is well deserved and God’s judgment will be completely righteous.