False teachers who secretly introduce destructive heresies, exploit others with deceptive words, and deny the Lord who redeemed them are still active in church today. Their doom is certain, as seen in past examples of God's punishment, like the fallen angels and Sodom and Gomorrah. However, God also rescues the righteous, as He did with Noah and Lot, showing that He knows how to deliver the godly while reserving the wicked for judgment.