Then said Jesus to those Jews which believed on him, If ye continue in my word, then are ye my disciples indeed; If ye continue in my word - Or, in this doctrine of mine. It is not enough to receive God's truth - we must retain and walk in it. And it is only when we receive the truth, love it, keep it, and walk in it, that we are the genuine disciples of Christ.
Related Commentaries of John 8:31
John 8:31
31 Then said Jesus to those Jews which believed on him,If ye continue in my word, then are ye my disciples indeed;