But there were also false prophets among the people. In the same way there will be false teachers among you. In secret they will bring in teachings that will destroy you. They will even turn against the Lord and Master who died to save them. His death paid for their sins. They will quickly destroy themselves.
References for 2 Peter 2:1
Many people will follow their shameful ways. They will give the way of truth a bad name.
Those teachers are never satisfied. They want to get something out of you. So they make up stories to take advantage of you. They have been under a sentence of death for a long time. The One who will destroy them has not been sleeping.
God did not spare angels when they sinned. Instead, he sent them to hell. He put them in dark prisons. He will keep them there until he judges them.
God did not spare the world's ungodly people long ago. He brought the flood on them. But Noah preached about the right way to live. God kept him safe. He also saved seven others.
God judged the cities of Sodom and Gomorrah. He burned them to ashes. He made them an example of what is going to happen to ungodly people.