1 John 2:18-21

18 Dear children, the last hour has come; and as you once heard that there was to be an anti-Christ, so even now many anti-Christs have appeared. By this we may know that the last hour has come.

19 They have gone forth from our midst, but they did not really belong to us; for had they belonged to us, they would have remained with us. But they left us that it might be manifest that professed believers do not all belong to us.

20 As for you, you have an anointing from the holy One and have perfect knowledge.

21 I have written to you, not because you are ignorant of the truth, but because you know it, and you know that nothing false comes from the truth.