It is in fashion at this time to believe it does not matter what you believe as long as you believe Christ is your Savior, and lead a good life. People who believe this ignore the fact that the reason Eve sinned was she believed a lie! It is important to believe the truth because false doctrine leads to sin.
Solomon knew this because he said, “Zeal without knowledge is not good; a person who moves too quickly may go the wrong way.” (Proverbs 19:2)
The New Testament also says false doctrine leads to sin. I Timothy 6:4 says, “Anyone who teaches anything different is both conceited and ignorant. Such a person has an unhealthy desire to quibble over the meaning of words. This stirs up arguments ending in jealousy, fighting, slander, and evil suspicions.” Paul tells us we must avoid having, “…lustful passions as the Pagans do in their ignorance of God and his ways.” (I Thessalonians 4:5)
Not only does the Bible tell us that lies lead to sin, it also tells us that Truth leads to righteousness. Paul said, “This same Good News…is changing lives everywhere. Just as it changed yours…” (Colossians 1:6) This is why Jesus said, “You are truly my disciples if you keep obeying my teachings, and you will know the Truth, and the Truth will set you free.” (John 8:31-32)
It is common these days to say right living is important: right doctrine is unimportant. This view ignores the fact that sin entered the world because Eve believed a lie. False doctrine leads to false practice as untruth leads to sin – thus it is important, not only to avoid false doctrine, but also to learn and to practice the teachings of Jesus.