4For if God did not spare angels when they sinned, but cast them into hell and committed them to chains of gloomy darkness to be kept until the judgment;
The final judgment of the wicked (the heretics) is guaranteed.
Those who have faith in God will escape judgment.
Do not despair when you see the ungodly prosper whilst the godly suffer.
4 For if God did not spare angels when they sinned, but cast them into hell and committed them to chains of gloomy darkness to be kept until the judgment;