5 The aim of our charge is love that issues from a pure heart and a good conscience and a sincere faith. 6 Certain persons, by swerving from these, have wandered away into vain discussion, 7 desiring to be teachers of the law, without understanding either what they are saying or the things about which they make confident assertions. 8 Now we know that the law is good, if one uses it lawfully, 9 understanding this, that the law is not laid down for the just but for the lawless and disobedient, for the ungodly and sinners, for the unholy and profane, for those who strike their fathers and mothers, for murderers, 10 the sexually immoral, men who practice homosexuality, enslavers, liars, perjurers, and whatever else is contrary to sound doctrine, 11 in accordance with the gospel of the glory of the blessed God with which I have been entrusted. 1 Timothy 1:5-11 (ESV)
Carefully read the passage I placed at the top of this post. What is the aim of the charge of a true discipler? It is to produce the good fruit of of love that issues from a pure heart and a good conscience and a sincere faith. That is the good fruit of a genuine prophet of the Gospel of the Lord Jesus Christ. On the other hand, our Lord Himself told us in His Sermon on the Mount how to discern whether a prophet was false or not.
15 “Beware of false prophets, who come to you in sheep’s clothing but inwardly are ravenous wolves. 16 You will recognize them by their fruits. Are grapes gathered from thornbushes, or figs from thistles? 17 So, every healthy tree bears good fruit, but the diseased tree bears bad fruit. 18 A healthy tree cannot bear bad fruit, nor can a diseased tree bear good fruit. 19 Every tree that does not bear good fruit is cut down and thrown into the fire. 20 Thus you will recognize them by their fruits. Matthew 7:15-20 (ESV)