5 Bible Verses about Heresy

I know your works, and your labor, and your patience; and that you can not bear with those who are evil, and that you have tried those who say they are apostles, and are not, and have found them liars;

Inasmuch as we have heard that certain persons went out from us and troubled you with words, subverting your souls, saying, That you must be circumcised, and keep the law, to whom we gave no commandment,

which is nothing else than that there are some who trouble you, and are determined to pervert the gospel of the Christ.

For if he that comes should preach another Jesus, whom we did not preach, or, if you receive another Spirit, which you did not receive, or another gospel, which you have not accepted, you would well bear with him.

I acted thus indeed on account of false brethren, stealthily brought in, who stole in to spy out our freedom, which we have in Christ Jesus, that they might bring us into bondage,

A man that is a sectary, reject, after the first and second admonition, knowing that such a one is perverted, and sins, being self-condemned.

If any one comes to you, and brings not this teaching, receive him not into your house, and do not wish him well: for he that wishes him well, is partaker of his evil deeds.

And having brought them to the magistrates, they said: These men, who are Jews, do greatly trouble our city; and they teach customs which it is not lawful for us, who are Romans, to receive or to observe.

And when they had laid many stripes on them, they threw them into prison, and charged the jailer to keep them securely.

nor are they able to prove the things of which they now accuse me. But this I confess to you, that after the way which they call sect, so do I worship the God of my fathers; believing all things that are written in the law and in the prophets; having hope in God, which they themselves also admit, that I there will be a resurrection of the dead, both of the just and of the unjust. read more.
And I do exercise myself in this, always to have a conscience void of offense toward God and man.

saying: This man persuades men to worship God contrary to the law.