The Bible reveals that God gives lawfully constituted civil authorities the right to carry out capital punishment in certain instances (Gen. 9:5, Ex. 21:12-17, Deut. 7:1-2, Acts 25:10-11). These “governing authorities” do not bear the “sword in vain” (Rom. 13:1-4).
But the New Testament teachings of Christ and His apostles make it clear that true Christian believers are not to be part of the secular governments of this world. Only those who don’t know the true God should be the executioners of the wicked.
Here, then, is the New Testament teaching for true Christians: We are not to bear arms or use swords or guns to enforce Caesar’s laws, avenge ourselves or punish evildoers. When the apostle Peter, with a sword, cut off the ear of a man, Christ rebuked him, saying, “Put your sword in its place, for all who take the sword will perish by the sword” (Matt. 26:52, John 18:10-11).
To the Christian, Paul says, “For though we walk in the flesh, we do not war according to the flesh” (II Cor. 10:3). Exodus 14:14 says, “The Lord will fight for you.”
The deceived billions on this earth “fight and war” but are unable to attain true peace (Jas. 4:1-2, KJV), because “the way of peace they have not known” (Rom. 3:17). But the true Christian “must not quarrel but be gentle to all” (II Tim. 2:24). He must set the proper example to the world.
“What about mercy killings (euthanasia), capital punishment, killing in self-defense, taking revenge, “just” wars, abortions (killing of unborn infants) and suicide?”
God, the giver of life (Gen. 2:7, Deut. 32:39), has the right to take any life if and when He chooses. But man does not have that power, unless God grants it to him. In numerous instances, God not only permitted His servants (prophets and civil leaders in the nation of Israel) to take life, but He actually commanded it under certain circumstances (I Sam. 15:3-33).
In New Testament times though, Christians are commanded never to avenge themselves, but let God do it in His own time and way (Rom. 12:19).
Mercy Killings or prolonging life
Are “mercy killings” permissible, since they are, supposedly, acts of mercy? No example in the Bible shows any people of God taking the life of another or their own, with God’s approval, either in acts of euthanasia or suicide.
God also does not say that we must give our loved ones drugs or oxygen or do all within our power, such as using various machines, to force them, contrary to nature, to live as long as possible, even when they are in great pain or totally unconscious.
Though God permits capital punishment to be carried out by those duly authorized, it is wrong for those in authority to abuse this power. They should not use this power to kill the just, as Herod did in the case of John the Baptist (Mark 6:14-29).
Abortions
What about abortions? Using abortion as an alternative form of birth control is tantamount to the practice of the ancient Canaanites and others, who slew their infants in sacrifice to pagan gods such as Baal in the mistaken belief that their gods would bless them for doing so. God gives us life, and only He can legitimately take it from us. Is it wrong to take a life, even that of an unborn. By doing so we violate God’s Sixth Commandment?
The Apple Of God's Eye 