1 John 2:18-21

Little children, it is the last hour: and as ye heard that antichrist cometh, even now have there arisen many antichrists; whereby we know that it is the last hour. They went out from us, but they were not of us; for if they had been of us, they would have continued with us: but they went out, that they might be made manifest that they all are not of us. And ye have an anointing from the Holy One, and ye know all things. I have not written unto you because ye know not the truth, but because ye know it, and because no lie is of the truth.