Matthew 5:21-24 "You have heard that it was said to those of old, 'You shall not murder, and whoever murders will be in danger of the judgment.' But I say to you that whoever is angry with his brother without a cause shall be in danger of the judgment. And whoever says to his brother, 'Raca!' shall be in danger of the council. But whoever says, 'You fool!' shall be in danger of hell fire. Therefore if you bring your gift to the altar, and there remember that your brother has something against you, leave your gift there before the altar, and go your way. First be reconciled to your brother, and then come and offer your gift."
"These verses deserve the closest attention of all readers of the Bible. A right understanding of the doctrines they contain lies at the very root of Christianity. The Lord Jesus here explains more fully the meaning of His words, "I came not to destroy the law, but to fulfill." He teaches us that His Gospel magnifies the law, and exalts its authority. He shows us that the law, as expounded by Him, was a far more spiritual and heart-searching rule than most of the Jews supposed. And He proves this by selecting three commandments out of the ten as examples of what He means.
He expounds the sixth commandment. Many thought that they kept this part of God's law, so long as they did not commit actual MURDER. The Lord Jesus shows, that its requirements go much further than this. It condemns all angry and passionate language, and especially when used without a cause. Let us mark this well. We may be perfectly innocent of taking life away, and yet be guilty of breaking the sixth commandment.
Now all this is very instructive. It ought to raise very serious reflections in our minds. It calls us loudly to use great searching of heart. And what does it teach?
It teaches us the exceeding holiness of God. He is a most pure and perfect Being, who sees faults and imperfections, where man's eyes often see none. He reads our inward motives. He notes our words and thoughts, as well as our actions. "He requires truth in the inward parts." Oh! that men would consider this part of God's character more than they do! There would be no room for pride, and self-righteousness, and carelessness, if they only saw God "as He is."
It teaches us the exceeding ignorance of man in spiritual things. There are thousands and ten thousands of professing Christians, it may be feared, who know no more of the requirements of God's law than the most ignorant Jews. They know the letter of the ten commandments well enough. They fancy, like the young ruler, "all these have I kept from my youth up." They never dream that it is possible to break the sixth and seventh commandments, if they do not break them by outward act or deed. And so they live on satisfied with themselves, and quite content with their little bit of religion. Happy indeed are they who really understand God's law!
It teaches us our exceeding need of the Lord Jesus Christ's atoning blood to save us. What man or woman upon earth can ever stand before such a God as this, and plead "not guilty?" Who is there that has ever grown to years of discretion, and not broken the commandments thousands of times? "There is none righteous, no! not one." Without a mighty Mediator, every one would be condemned in the judgment. Ignorance of the real meaning of the law is one plain reason why so many do not value the Gospel, and content themselves with a little formal Christianity. They do not see the strictness and holiness of God's Ten commandments. If they did, they would never rest until they were safe in Christ." - JC Ryle