Envy is a sin that will cause even physical consequences. It will cause our bones to rot. The death in our lives that is caused by envy is experienced right away. Envy causes a death to our relationships. The first murder in the Bible was caused by envy. Cain envied Abel because God favored Abel's sacrifice over his own. Envy will also bring death to peace in our lives. Envy always causes strife. James tells us, "But if you have bitter envy and self-seeking in your hearts, do not boast and lie against the truth. This wisdom does not descend from above, but is earthy, sensual, demonic. For where envy and self-seeking exist, confusion and every evil thing are there" (James 3:14-16).
When envy is present, strife will soon occur; this then opens the door to confusion and every evil work. The spirit of jealousy is what caused the first murder, so whenever we are jealous of another, in a sense we may wish that person dead. Envy occurs when we feel we have not been treated fairly. The way we can kill envy instead of allowing it to kill us is to humble ourselves.
We need to esteem others higher than ourselves. If we do, we will never be envious. Pride is the root of envy, and we destroy pride when we gladly take upon ourselves the form of a servant just as Jesus did. Life is not fair. Some people have more than others in intelligence, wealth, meaningful relationships, etc. God is just and merciful, however, and if you determine to humble yourself under the mighty hand of God, He promises to lift you up.
At the foot of the cross, we are all at the same level. We need to remain at the foot of the cross daily, and envy will never invade our lives to destroy it.