"You have heard that it was said to the people long ago, 'Do not murder, and anyone who murders will be subject to judgment.' But I tell you that anyone who is angry with his brother will be subject to judgment. Again, anyone who says to his brother, 'Racca,' is answerable to the Sanhedrin. But anyone who says 'You fool!' will be in danger of the fire of hell." NIV
"Ye have heard that it was said by them of old time, Thou shalt not kill; and whosoever shall kill shall be in danger of the judgment: But I say unto you, That whosoever is angry with his brother without a cause shall be in danger of the judgment: and whosoever shall say to his brother, Racca, shall be in danger of the council: but whosoever shall say, Thou fool, shall be in danger of hell fire." KJV
Jesus' fulfillment of the Law makes us more accountable than the teaching of the Pharisees and teachers of the Law. He told us that we have committed murder in our hearts if we have an angry attitude toward another. What's more, He didn't stop there. If we assume a position of superiority over another and curse him, we have a murderous heart. Jesus' fulfillment of the Law not only prohibits sinful acts, but also the sinful thoughts that surround them.
Heavenly Father, please search our hearts and minds and reveal to us if we have any thoughts of anger or resentment toward anyone. Help us to confess it, and repent. Fill our hearts with love, even toward our enemies and those who hate us and hurt us. We pray this in Jesus' name, Amen.