“The Scriptures charge sin, perniciousness, and damnation upon heresy. Paul reckons them among those works of the flesh which shut persons out of the Kingdom of God (Galatians 5:20-21). Peter calls them pernicious and damnable, and such as bring swift destruction; and, speaking of the authors of them, he says that their damnation slumbers not (2 Peter 2:1-3).”

https://www.semperreformanda.com/doctrine-2/

https://www.semperreformanda.com/the-regulative-principle-of-worship/the-regulative-principle-of-worship-articlesindex/inconsistencies-in-worship/

https://www.semperreformanda.com/the-regulative-principle-of-worship/the-regulative-principle-of-worship-articlesindex/idol-worship/