Not only is suicide a sin, it is the sin. It is the ultimate and absolute evil, the refusal to take an interest in existence; the refusal to take the oath of loyalty to life. The man who kills a man, kills a man. The man who kills himself, kills all men. As far as he is concerned he wipes out the world.
Many statements about God are confidently made by theologians on grounds that today at least sound specious. Thomas Aquinas claimed to prove that God cannot make another God, or commit suicide, or make a man without a soul, or even make a triangle whose interior angles do not equal 180 degrees. But Bolyai and Lobachevsky were able to accomplish this last feat (on a curved surface) in the nineteenth century, and they were not even approximately gods.
When neither high purpose nor the categorical imperatives of religion will do, the only argument against suicide is life itself. You pause and attend: the heart beats in your chest; outside, the trees are thick with new leaves, a swallow dips over them, the light moves, people are going about their business.
Our enemies send other people's children on missions of suicide and murder. They embrace tyranny and death as a cause and a creed. We stand for a different choice - made long ago, on the day of our founding. We affirm it again today. We choose freedom and the dignity of every life.
Irrevocable commitment to any religion is not only intellectual suicide; it is positive unfaith because it closes the mind to any new vision of the world. Faith is, above all, openness - an act of trust in the unknown.
I do see that there is an argument against suicide: the grief of the worshipers left behind, the awful famine in their hearts, these are too costly terms for the release.
We remember the grind of the insurgency -- the roadside bombs, the sniper fire, the suicide attacks. From the 'triangle of death' to the fight for Ramadi; from Mosul in the north to Basra in the south -- your will proved stronger than the terror of those who tried to break it.