Speaking as one weak (or brave and stupid) enough to have attempted suicide a couple times, I would have to say there is no definate line in the sand you have to cross to be able to justify killing yourself. Everyone's experience is different- some people endure terrible hardships and can live out happy, satisfying lives anyway, whereas others (like me) fall at the first hurdle, and can hardly endure getting out of bed before 12 noon.
Suicide, in my opinion, is an entirely selfish act. I can't think of any examples where it would be selfless- even if it were in the case of someone who requires a lot of care from their loved ones, I truly believe that inspite of all the stress and difficulty of caring for the person, they would much rather do all this, and have the person around, than have that person kill themselves and save them the bother, to put it crudely. I know that I am a very difficult person to be around when I am depressed and suicidal, but my friends have stuck by me, and showed such love for me, that I know killing myself would hurt them too much. It would be the most selfish act I could commit- and as long as my desire not to hurt my friends outweighs my need for everything to just stop- I won't kill myself. I hope.
As for the strength/weakness thing, I can't decide. When I tried to kill myself I was terrified, and did it anyway (which is a popular definition of courage, courage commonly regarded as a strength). But suicide is also an admission of weakness- its the loudest way of saying- I cannot take it anymore, I am giving up. I suppose the act is brave, in a twisted sort of way, but what it represents is a confession of absolute weakness, absolute inadequacy- an inability to cope with the reality and difficulty of living.
I think I answered the last two questions in the above.
Interesting thoughts MM, I hope my reply didn't suck too much.
Thankyou for the comments on my blog. I do appreciate them, although I never know how to reply.
Dyl xx