The law of the Lord is perfect, converting the soul; the testimony of the Lord is sure, making wise the simple.--Psalm 19:7
Since "the law of the Lord is perfect," every variation from it must be evil. Those who disobey the commandments of God, and teach others to do so, are condemned by Christ. The Saviour's life of obedience maintained the claims of the law; it proved that the law could be kept in humanity, and showed the excellence of character that obedience would develop. All who obey as He did are likewise declaring that the law is "holy, and just, and good." Romans 7:12.
On the other hand, all who break God's commandments are sustaining Satan's claim that the law is unjust, and cannot be obeyed. Thus they second the deceptions of the great adversary, and cast dishonor upon God. They are the children of the wicked one, who was the first rebel against God's law. To admit them into heaven would again bring in the elements of discord and rebellion, and imperil the well-being of the universe. No man who willfully disregards one principle of the law shall enter the kingdom of heaven....
The greatest deception of the human mind in Christ's day was that a mere assent to the truth constitutes righteousness. In all human experience a theoretical knowledge of the truth has been proved to be insufficient for the saving of the soul. It does not bring forth the fruits of righteousness. A jealous regard for what is termed theological truth often accompanies a hatred of genuine truth as made manifest in life. The darkest chapters of history are burdened with the record of crimes committed by bigoted religionists....
The same danger still exists. Many take it for granted that they are Christians, simply because they subscribe to certain theological tenets. But they have not brought the truth into practical life. They have not believed and loved it, therefore they have not received the power and grace that come through sanctification of the truth. (Desire of Ages, 308-310)
REFLECTION: Without the law, men have no just conception of the purity and holiness of God or of their own guilt and uncleanness. They have no true conviction of sin and feel no need of repentance. Not seeing their lost condition as violators of God's law, they do not realize their need of the atoning blood of Christ. The hope of salvation is accepted without a radical change of heart or reformation of life. Thus superficial conversions abound, and multitudes are joined to the church who have never been united to Christ. (The Great Controversy, 468)