I urge you, brothers, to watch out for those who cause divisions and put obstacles in your way that are contrary to the teaching you have learned. Keep away from them. For such people are not serving our Lord Christ, but their own appetites. By smooth talk and flattery they deceive the minds of naive people. 2 Peter 2: 1-3 But there were also false prophets among the people, just as there will be false teachers among you. They will secretly bring destructive heresies, even denying the sovereign Lord who brought them-bringing swift destruction on themselves. Many will follow their shameful ways and will bring the truth into disrepute. In their greed these teachers will exploit you with stories they have made up. Their condemnation has long been hanging over them, and their destruction has not been sleeping.
2 Timothy 4: 1-5 In the presence of God and of Christ Jesus, who will judge the living and the dead, and in view of his appearing, and his kingdom, I give you this charge: Preach the Word; be prepared in season and out of season; correct, rebuke and encourage- with great patience and careful instruction. For the time will come when men will not put up with sound doctrine. Instead, to suit their own desires, they will gather around them a great number of teachers to say what their itching ears want to hear. They will turn their ears away from the truth and turn aside to myths. But you, keep your head in all situations, endure hardship, do the work of an evangelist, discharge all the duties of your ministry.