Take special note of the warning by Jesus in verse 18. He there cautioned we must "pay attention to," or "be careful of,
how we listen." He often warned against false prophets who would come in his name, thus providing keen awareness we must be vigilant never to be fooled by them. (
Mat 7:15;
Mat 24:4-5) He here warns those who are "followers of men" may assert and even believe they have real knowledge, but even what they have (the lies they have accepted) will be taken away from them. Those actually listening to and learning the truth from Christ Jesus, however, will be given more and more. In verse 17, Jesus explains all religious lies will be revealed. All we need do is actually listen to Christ to be set free of religious doctrinal teachings. (
John 8:31-32) Reading the words of Christ from
Matthew,
Mark,
Luke or
John is the only way we can be certain we are not being led astray by some
religious doctrine contrived by men. (
Acts 17:29-31)