Chronicle number one of God’s gospel dealt with the great problem man has before God. It showed the doctrine of condemnation. All need the gospel for all share in the bad news. All, religious and nonreligious, are not just sinners but stand guilty for their sin before God.
For example, one might go out to his garden to get a head of cabbage and find the cabbage is all mushy and rotten. He does not, however, call the police and press charges against the cabbage. For though the cabbage is bad, it is not guilty; it had no moral responsibility. It was just a victim of its environment. But if a thief broke into his house and stole his goods, cabbages included, now he presses charges for the thief was morally responsible and therefore guilty.