Ever read Galations?
Paul was full of joy when that church followed a false Gospel.
ROTFLOL. I guess you have your answer.
"As for me, this is my covenant with them, saith the LORD; My spirit that is upon thee, and my words which I have put in thy mouth, shall not depart out of thy mouth, nor out of the mouth of thy seed, nor out of the mouth of thy seed's seed, saith the LORD, from henceforth and for ever." -- Isaiah 59:21
And some, not so much.