I recently heard ex-soccer star, Stan Collymore, talking in the wake of Gary Speed's death (which the coroner has now decided may possibly have been accidental), very openly and thoughtfully about his own depression, which he has suffered throughout his life. He addressed the issue of suicide, and the times he had considered it. Especially those who describe it, very understandably, as a selfish act, giving no thought to those who are "left behind".
His words were a revelation to me (I had previously taken the 'selfish act' view), and made so much sense. He said that to him it was a solution. Not just for him, but all those dear to him, whose lives he felt he had blighted through his illness, and that far from being a selfish act, suicide (at that moment, and with that moment's thought processes) was the answer to everyone's problems, least of all his own. Of course, that's not the way anyone else would see it, but it was a clear, obvious, dispassionate and selfless decision for him to make at that moment. And thankfully one he never took.