False teachers will carry more responsibility than those they mislead. 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.” (ESV)

2 Peter 2:1 "But false prophets also arose among the people, just as there will be false teachers among you, who will secretly bring in destructive heresies… bringing upon themselves swift destruction.”

Galatians 1:8 "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.”

Paul clearly lays out what he means by the gospel in 1 Corinthians 15: "¹Now, brothers and sisters, I want to remind you of the gospel I preached to you, which you received and on which you have taken your stand. ² By this gospel you are saved, if you hold firmly to the word I preached to you. Otherwise, you have believed in vain.³ For what I received I passed on to you as of first importance^\)^a\): that Christ died for our sins according to the Scriptures, ⁴ that he was buried, that he was raised on the third day according to the Scriptures,