 If you abide in my word, then you are truly disciples of mine. That word abide means to remain. It means to continue. It means to stay. And the way you know that you're true is that you are abiding in the Lord and in his word and you have a desire to obey him. Doesn't mean you obey him perfectly because nobody does, but it means that desire is in your heart and it wasn't there before. Now, how do you know a false disciple?