True and False Prophets
Moses gave Israel a simple test in Deuteronomy 18: if a prophet’s word does not come to pass, that word did not come from the LORD. Scripture gives other tests as well, including whether a prophet remains faithful to God, the fruit their life produces, and what they confess about Christ. More than once, Scripture puts a true prophet and a false prophet side by side and lets the difference speak for itself.
The Tests
Fulfilled Prophecy
True prophet: What he predicts comes true
False prophet: Predicts, and it fails
Deuteronomy gives the baseline test: if what a prophet says in the LORD's name does not happen, the LORD did not speak it, and no one needs to fear that prophet.
Fidelity to the LORD
True prophet: Points to the LORD, even when the sign works
False prophet: Leads toward other gods, even when the sign works
A sign coming true is not enough on its own. Even a prophet whose sign or wonder comes to pass is false if the message leads Israel to worship another god.
Source of the Word
True prophet: Stood in the LORD's council
False prophet: Speaks from his own heart
Jeremiah accuses Jerusalem's prophets of never standing in the LORD's council to hear his word, and of repeating prophecies they heard from one another instead.
Fruit of Life
True prophet: Good fruit, marked by repentance and righteousness
False prophet: Bad fruit, marked by adultery, lies, and corruption
Jesus points to the fruit a prophet bears, not their claims or credentials. A good tree does not produce bad fruit. Jeremiah likewise condemns the prophets of his day for their adultery, lies, and failure to turn people from their wickedness.
Confession of Christ
True prophet: Confesses Jesus Christ come in the flesh
False prophet: Spirit of antichrist
John gives a specifically Christian test: a spirit that confesses Jesus Christ come in the flesh is from God; one that does not is the spirit of antichrist.
Motive
True prophet: Serves without demanding pay
False prophet: Divines for money
Micah accuses prophets who cry "peace" for anyone who pays them and "war" on anyone who does not. Peter later warns of teachers who exploit people with made-up words for the same reason: profit.