Peter warned of false teachers who would invade the church, speaking evil of things they do not understand, and so they will perish in their own corruption (2 Peter 2:12).
Peter said further that they,
“will receive the wages of unrighteousness, as those who count it pleasure to carouse in the daytime” (2 Peter 2:13).
These people grieve us when they invade the church, but the Lord shall put them to deep grief, unless they repent.
Therefore, do not lose hope, but remain faithful to the Lord and He shall bless you mightily.