5 Bible Verses about Heresy

I know thy works, and thy travail, and thy patience, and that thou canst not bear the wicked; and hast tried those who give themselves out as apostles, yet are not, and hast found them liars;

Forasmuch as we have heard, that certain persons who went out from us have disturbed you with discourses, unsettling your minds, insisting, that you should be circumcised, and observe the law: to whom we gave no such charge:

which is not another; but there are certain persons who trouble you, and desire to pervert the gospel of Christ.

For if he indeed that cometh preach another Jesus, whom we have not preached, or ye receive another spirit, which ye have not received, or another gospel, which ye have not embraced, ye might well bear with him.

but this I did because of false brethren artfully introduced, who came to pry into our liberty which we hold in Christ Jesus, that they might bring us into bondage:

An heretical person after a first and second admonition reject; knowing that such a one is perverted, and sinneth, being self-condemned.

If any person come unto you, and bring not this doctrine, receive him not into the house, nor say to him, Welcome. He that biddeth him welcome, takes part in his wicked works.

and presenting them to the magistrates, they said, These are the men that exceedingly disturb the peace of our city, being Jews, and enjoin customs which it is not lawful for us to receive, or to practise, being Romans.

And laying on them many stripes, cast them into prison, commanding the jailor to keep them in safe custody:

neither can they produce any proof of the facts of which they accuse me. But this I confess to thee, that after the way which they call a sect, so worship I the God of our ancestors, believing all things that are written in the law, and in the prophets: and having hope in God, the same which they also profess to look for, that there shall be a resurrection of the dead, both of the just and of the unjust. read more.
For this cause indeed I exert my utmost care to keep my conscience ever unoffending towards God and towards man.

saying, This is the fellow that earnestly persuades men to worship God contrary to the law.