4. Some people have secretly entered your group. These people have already been judged guilty for what they are doing. Long ago the prophets wrote about them. They are against God. They have used the grace of our God in the wrong way—to do sinful things. They refuse to follow Jesus Christ, our only Master and Lord.
5. I want to help you remember some things you already know: Remember that the Lord saved his people by bringing them out of the land of Egypt. But later he destroyed all those who did not believe.
6. And remember the angels who lost their authority to rule. They left their proper home. So the Lord has kept them in darkness, bound with everlasting chains, to be judged on the great day.