Bank tellers spot fake bills instantly because they handle real ones constantly. The same principle applies to spiritual teaching: spend enough time with authentic doctrine and you'll recognize false prophets immediately.
You can be following a false prophet, and on that day of judgment, you can't blame false prophecy for why you ended up where you ended up. It would be your fault for not being able to distinguish the real from the fake. You couldn't distinguish the real from the fake because you spent too much time with the fake that you couldn't even see the real. You know, people that work in the bank, they can spot fakes like that. People that been in the sneaker game for so long, they can spot fakes like that. When you spent enough time with the real, it would be easy for you to see that this thing this person is preaching is, is wrong.
