²⁹ I know that trouble will come to you after I leave. Bad people will come to teach you. They will cause trouble for the believers, like dangerous wild animals that attack sheep. ³⁰ Even men from your own group of believers will teach things that are not true. They want to deceive other believers, so that they leave you and join with them. ³¹ So be very careful! For three years I taught you, in the day and in the night. I warned you to be careful, so that I even cried about it.