"But the Spirit speaks explicitly that in the latter times some shall depart from the faith, giving heed to seducing spirits and doctrines of demons, speaking lies and hypocrisy having their conscience burned with a hot iron, forbidding to marry and commanding to abstain from foods which God hath created to be received with thanksgiving by them who believe and know the truth, for every creature of God is good and nothing is to be refused if it is received with thanksgiving, for it is sanctified by the Word of God and prayer."
The key to this passage is the simple phrase in verse 1, "Some shall depart from the faith." The rest of the passage describes elements of such a departure. Some shall depart from the faith.
In 2 Chronicles chapter 25, there is the story of a king, a king of Judah by the name of Amaziah. He was the son of Joash and the father of Uzziah who was king during the time if Isaiah the prophet. Amaziah reigned in Jerusalem twenty-nine years. Scripture says of him, initially, he did that which was right in the sight of the Lord but now with a willing or perfect heart. He functioned in accord with the religion of Israel on the outside. He knew it. He understood it. He behaved by its ethics, but not with a perfect heart. He had a heartless external religion. ...