There is much killing that goes on with the tongue. We must guard our words and be careful that they do not damage the reputation or the feelings of others. God has called us to live in peace and unity with one another. Don't destroy that unity with criticism of others within the body of Christ. This commandment forbids the act of suicide.
Suicide is self-murder.
A - The sixth commandment forbiddeth the taking away of our owwn life, or the life of our neighbor unjustly, or whatsoever tendeth thereunto. You have no more right to take your own life than you do the life of someone else. God alone has the right to take life, and therefore we must place our lives in His hands and let God decide when our life should end. Job's wife told him to curse God and die. Job underwent terrible physical suffering with boils all over his body, yet he knew that suicide was wrong, because only the Lord had the right to give or to take life.