2 Peter 2:1-3
But there were also false prophets among the people, even as there will be false teachers among you; who will privately introduce destructive sects, denying even the Lord who bought them, bringing on themselves swift destruction.
Jude 1:10-13
but these, indeed, revile those things which they do not know; but what things they do know, naturally, as animals void of reason, by these things they destroy themselves.
Revelation 3:8
I know your works: behold, I have set before you an open door, and no man can shut it; because you have little strength, and have kept my word, and have not denied my name.
Revelation 3:10
Because you have kept the word of my patience, I will also keep you from the hour of temptation, which shall come upon all the world, to try the inhabitants of the earth.
1 Peter 3:15-16
but sanctify the Lord God in your hearts; and be always prepared for giving an answer, with meekness and reverence, to every one who asks of you a reason for the hope which is in you.
2 Peter 2:12-22
But these, as natural, irrational animals, made for capture and destruction, speaking evil of matters which they do not understand, shall be utterly destroyed by their own corruptions;
1 John 2:19
They went away from us, but they were not of us. For, if they had been of us, they would have abode with us; but they went away, that they might be made manifest that they were not of us.
Revelation 3:3
Remember, therefore, how you have received and heard, and hold fast, and reform: therefore, unless you are watchful, I will come upon you as thief, and you shall not know what hour I will come upon you.