1 Corinthians 3:18 Do not deceive yourselves. If any one of you thinks he is wise by the standards of this age, he should become a "fool" so that he may become wise. 19 For the wisdom of this world is foolishness in God's sight. As it is written: "He catches the wise in their craftiness" 20 and again, "The Lord knows that the thoughts of the wise are futile."

Ecclesiastes 12:12 Be warned, my son, of anything in addition to them. Of making many books there is no end, and much study wearies the body. ( just how many books on religion?)
13 Now all has been heard; here is the conclusion of the matter: Fear God and keep his commandments, for this is the whole [duty] of man.
14 For God will bring every deed into judgment, including every hidden thing, whether it is good or evil.

Galatians 1:7 ... but there be some that trouble you, and would pervert the gospel of Christ.

Matthew 7:15 "Watch out for false prophets. They come to you in sheep's clothing, but inwardly they are ferocious wolves.

Matthew 24:11 and many false prophets will appear and deceive many people.

Matthew 24:24 For false Christs and false prophets will appear and perform great signs and miracles to deceive even the elect--if that were possible.

Mark 13:22 For false Christs and false prophets will appear and perform signs and miracles to deceive the elect--if that were possible.

2 Peter 2:1 But there were also false prophets among the people, just as there will be false teachers among you. They will secretly introduce destructive heresies, even denying the sovereign Lord who bought them--bringing swift destruction on themselves.

1 John 4:1 Dear friends, do not believe every spirit, but test the spirits to see whether they are from God, because many false prophets have gone out into the world.

2 Timothy 4:3 For the time will come when men will not put up with sound doctrine. Instead, to suit their own desires, they will gather around them a great number of teachers to say what their itching ears want to hear.

Matthew 15:9 But in vain they do worship me, teaching for doctrines the commandments of men.

Mark 7:7 Howbeit in vain do they worship me, teaching for doctrines the commandments of men.

Colossians 2:22 Which all are to perish with the using;) after the commandments and doctrines of men?

1 Timothy 4:1 Now the Spirit speaketh expressly, that in the latter times some shall depart from the faith, giving heed to seducing spirits, and doctrines of devils;

Hebrews 13:9 Be not carried about with divers and strange doctrines. For it is a good thing that the heart be established with grace; not with meats, which have not profited them that have been occupied therein.

1 Thessalonians 5:21 Test everything. Hold on to the good. 22 Avoid every kind of evil.

Luke 20:45-47 "Beware of the teachers of the law. They like to walk around in flowing robes and love to be greeted in the marketplaces and have the most important seats in the synagogues and the places of honor at banquets.

Acts 13:9-11 "You son of the Devil, full of every sort of trickery and villainy, enemy of all that is good, will you never stop perverting the true ways of the Lord?

2 Peter 2:2-4 In their greed these teachers will exploit you with stories they have made up.

1 Corinthians 15:1-3 By this gospel you are saved, if you hold firmly to the word I preached to you. Otherwise, you have believed in vain.

2 Corinthians 6:1-2 As God's fellow workers we urge you not to receive God's grace in vain.

Philippians 2:3-4 Do nothing out of selfish ambition or vain conceit, but in humility consider others better than yourselves.

Rev. 22:18, 19: "For I testify unto every man that heareth the words of the prophecy of this book, If any man shall add unto these things, God shall add unto him the plagues that are written in this book: And if any man shall take away from the words of the book of this prophecy, God shall take away his part out of the book of life, and out of the holy city, and from the things which are written in this book."

Acts 17 :11 Now the Bereans were of more noble character than the Thessalonians, for they received the message with great eagerness and examined the Scriptures every day to see if what Paul said was true.