The Lord knows how to rescue the godly from trials and to hold the unrighteous for punishment on the day of judgment

2 Peter 2:1-9

But there were also false prophets among the people, just as there will be false teachers among you. They will secretly introduce destructive heresies, even denying the sovereign Lord who bought them—bringing swift destruction on themselves. Many will follow their depraved conduct and will bring the way of truth into disrepute. In their greed these teachers will exploit you with fabricated stories. Their condemnation has long been hanging over them, and their destruction has not been sleeping.

For if God did not spare angels when they sinned, but sent them to hell, putting them in chains of darkness to be held for judgment; if he did not spare the ancient world when he brought the flood on its ungodly people, but protected Noah, a preacher of righteousness, and seven others.  if he condemned the cities of Sodom and Gomorrah by burning them to ashes, and made them an example of what is going to happen to the ungodly; and if he rescued Lot, a righteous man, who was distressed by the depraved conduct of the lawless. 

if this is so, then the Lord knows how to rescue the godly from trials and to hold the unrighteous for punishment on the day of judgment. 

Why?

There have been false prophets among the people, from the time of Peter until now. But we are not alone, for the Lord is with us, In ancient times the Lord saved Noah and his family, and rescued Lot and his family when the Lord condemned ungodly people. 

Because of their greed, these teachers will explore us with fabricated stories. So the falling is from their greedy hearts.

We don't worry too much about the ungodly people and they den the sovereign Lord, when the time is up, all these will gone and disappear.

How?

Our faith is strong, keeping our behavior as the Lord told us. Do my best as a servant of the Lord and humble myself. Keep away from greedy hearts.