re 612(in case someone else posts in the meantime)
while false teaching might be dangerous to some people, your post is even more dangerous, as people don't find out HOW they can be saved.
if anyone trusts in themselves, then, absolutely - they have failed already.
jesus told the disciples the exact same thing.
and he told them, as always, that if they trust their heavenly father to accomplish the change in their life - salvation and everything associated with salvation , including freedom from sin and from the power of sin, from the power of the devil, from the power of religion, from the power of demons, and so on --- all the freedoms freely given by father in christ jesus,
then this is all already as good as done, "it is finished" you might say, as YAHWEH always keeps and guards His Word and His Own.