1 John 4:1
Beloved, do not believe every spirit, but test the spirits to see whether they are from God, for many false prophets have gone out into the world.
But solid food is for the mature, for those who have their powers of discernment trained by constant practice to distinguish good from evil.
And it is my prayer that your love may abound more and more, with knowledge and all discernment, so that you may approve what is excellent, and so be pure and blameless for the day of Christ,
For the word of God is living and active, sharper than any two-edged sword, piercing to the division of soul and of spirit, of joints and of marrow, and discerning the thoughts and intentions of the heart.
Do not be conformed to this world, but be transformed by the renewal of your mind, that by testing you may discern what is the will of God, what is good and acceptable and perfect.
1 Kings 3:9
Give your servant therefore an understanding mind to govern your people, that I may discern between good and evil, for who is able to govern this your great people?
If any of you lacks wisdom, let him ask God, who gives generously to all without reproach, and it will be given him.
1 Corinthians 2:14
The natural person does not accept the things of the Spirit of God, for they are folly to him, and he is not able to understand them because they are spiritually discerned.
Do not judge by appearances, but judge with right judgment.
1 Thessalonians 5:21
But test everything; hold fast what is good.
1 Corinthians 14:33
For God is not a God of confusion but of peace. As in all the churches of the saints,
2 Corinthians 11:13-15
For such men are false apostles, deceitful workmen, disguising themselves as apostles of Christ. And no wonder, for even Satan disguises himself as an angel of light. So it is no surprise if his servants, also, disguise themselves as servants of righteousness. Their end will correspond to their deeds.
Behold, I am sending you out as sheep in the midst of wolves, so be wise as serpents and innocent as doves.
1 Corinthians 12:10
To another the working of miracles, to another prophecy, to another the ability to distinguish between spirits, to another various kinds of tongues, to another the interpretation of tongues.
I am your servant; give me understanding, that I may know your testimonies!
See to it that no one takes you captive by philosophy and empty deceit, according to human tradition, according to the elemental spirits of the world, and not according to Christ.
1 Timothy 6:3-5
If anyone teaches a different doctrine and does not agree with the sound words of our Lord Jesus Christ and the teaching that accords with godliness, he is puffed up with conceit and understands nothing. He has an unhealthy craving for controversy and for quarrels about words, which produce envy, dissension, slander, evil suspicions, and constant friction among people who are depraved in mind and deprived of the truth, imagining that godliness is a means of gain.
Whoever is wise, let him understand these things; whoever is discerning, let him know them; for the ways of the Lord are right, and the upright walk in them, but transgressors stumble in them.
My son, if you receive my words and treasure up my commandments with you, making your ear attentive to wisdom and inclining your heart to understanding; yes, if you call out for insight and raise your voice for understanding, if you seek it like silver and search for it as for hidden treasures, then you will understand the fear of the Lord and find the knowledge of God.
1 Timothy 4:1
Now the Spirit expressly says that in later times some will depart from the faith by devoting themselves to deceitful spirits and teachings of demons,
Unless otherwise noted, all Bible verses are from The Holy Bible, English Standard Version® Copyright© 2001 by Crossway Bibles, a publishing ministry of Good News Publishers.
Special thanks to OpenBible.info for the data on the most well-known Bible verses.