Acts 13:7
who was a friend of the Proconsul Sergius Paulus. The Proconsul was a man of keen intelligence. He sent for Barnabas and Saul, and asked to be told God's Message.
Romans 16:18-19
For men of that stamp are not bondservants of Christ our Lord, but are slaves to their own appetites; and by their plausible words and their flattery they utterly deceive the minds of the simple.
Ephesians 4:14
So we shall no longer be babes nor shall we resemble mariners tossed on the waves and carried about with every changing wind of doctrine according to men's cleverness and unscrupulous cunning, making use of every shifting device to mislead.
Ephesians 5:17
On this account do not prove yourselves wanting in sense, but try to understand what the Lord's will is.
1 John 4:1
Dear friends, do not believe every spirit, but put the spirits to the test to see whether they are from God; for many false teachers have gone out into the world.