Matt 7:21-23----- these believe in Jesus, will call on his name--they believe in grace and faith and salvation----- They loved Jesus so much they did powerful works in his name, expelled demons, etc---
2 problems got in the way of all of that---1) they did not live to do Gods will now--2) they practiced sin.
Its a guarantee some teacher of darkness told them they were saved and the believed they were saved---it wasn't truth.
Romans 3:9 ¶ What then? are we better than they? No, in no wise: for we have before proved both Jews and Gentiles, that they are all under sin;
Romans 3:10 As it is written, There is none righteous, no, not one:
Romans 3:11 There is none that understandeth, there is none that seeketh after God.
Romans 3:12 They are all gone out of the way, they are together become unprofitable; there is none that doeth good, no, not one.
Romans 3:9 says you aren't better than them so where does that leave you in your teaching? You practice sin. There is none that doeth good, no, not one.