Suicide has been described as the sincerest form of self-criticism.
There are so many grey areas to this. Some random thoughts...
A young woman in our territory attempted suicide by jumping out of a window - she only succeeded in leaving herself paralysed from the neck down, unable to talk, partially blind and the list goes on. Her mum now says she's very happy and glad to have survived, but if that is true wouldn't life have been so much happier for her had she still had her health?
It does cause terrible pain for people left behind, but on rare occasions - that is the purpose.
Assisted suicide has public support in the UK and judges have been instructed to take into account the motives of those assisting suicide and not prosecute if they were just carrying out the wishes of the dying patient. I personally would prefer to end my life at a moment of my choosing rather than suffer to the end from some painful illness.
Is it wrong? Motives & method are important. Committing suicide if 10 years later you wouldn't do so for the same reasons is wrong - or perhaps poor decision making. Dying from refusal of a blood transfusion - that's suicide and that's wrong. Definitely wrong to jump in front of a train requiring people to pick up their body parts and make thousands of people late for work - that's plain selfish.
MMXIV