15 I know thy works, that thou art neither cold nor hot: I would thou wert cold or hot.
16 So then because thou art lukewarm, and neither cold nor hot, I will spue thee out of my mouth.
2 Timothy 2:15
Do your best to present yourself to God as one approved, a worker who has no need to be ashamed, rightly handling the word of truth.
James 3:1
Not many of you should become teachers, my brothers, for you know that we who teach will be judged with greater strictness.
2 Timothy 2:16
But avoid irreverent babble, for it will lead people into more and more ungodliness,
Galatians 1:6-10
I am astonished that you are so quickly deserting him who called you in the grace of Christ and are turning to a different gospel— not that there is another one, but there are some who trouble you and want to distort the gospel of Christ. But even if we or an angel from heaven should preach to you a gospel contrary to the one we preached to you, let him be accursed. As we have said before, so now I say again: If anyone is preaching to you a gospel contrary to the one you received, let him be accursed. For am I now seeking the approval of man, or of God? Or am I trying to please man? If I were still trying to please man, I would not be a servant of Christ.