Jer 28:15 Then said the prophet Jeremiah unto Hananiah the prophet, Hear now, Hananiah; The LORD hath not sent thee; but thou makest this people to trust in a lie.

Those word are haunting.

2Pe 2:1 But there were false prophets also among the people, even as there shall be false teachers among you, who privily shall bring in damnable heresies, even denying the Lord that bought them, and bring upon themselves swift destruction.