Suicide and Death

It is a Christian notion that suicide is "weak"

Amor Fati means that one's death is MEANT, and as deliberate as any suicide.
Hence the Samurai ritual suicide - see Mishima [ the Samurai philosophy is a Noble Superhumanist Ethic].

Is it ever 'weak' to kill oneself?
Isn't going willingly to your death the strongest thing you can do?

Isn't the man who begs for his life the weak one?
The man who will bargain his life for any infamy just so that he can live?

Isn't it one of the great tragic paradoxes of life that we possess both the instinct against death - the Schopenhauerian will to life - , coupled with the intellectual knowledge that we all die anyway?

Taking this thought of suicide as a 'temptation' [German, Versuch]; it is proof of strength that one entertains it - and then RESISTS it.

Nietzsche's famous quote 'What does not kill me makes me stronger' is relevant here.
Nietzsche describes this quote as being 'from the military school of life'; Nietzsche's own experience in war opened his eyes to the overcoming of depression necessary in the field of protracted combat.
Holed up in a filthy trench for months on end, always facing the possibility of sudden death - or even worse, of incapacitation, and therefore of being a burden on comrades.
In such conditions a man learns so much about himself.

Of course, the man who goes 'over the top', and faces enemy fire is courting death; to the Vikings to die a natural death [which is the Christian Secular ideal of dying in one's sleep common today] was dishonourable; they called this a 'Straw Death' [as beds were made out of straw].
The Viking MUST meet his death in Battle BECAUSE ONLY THEN COULD HE GO TO VALHALLA!
Through this metaphysic the Vikings conquered far and wide!

From this perspective, Nietzsche would agree with Kamakazi pilots and yes - suicide bombers!

There is also the clash between Christian and Pagan values. The former sees suicide as a 'sin', the latter sees it as couragous.
The Samurai ritual suicide was the culmination of a heroic life [see Mishima's version of the Samurai 'Hagakure' - this is a brilliant example of a very Nietzschean ethic; essentially the Samurai lives expecting death at every second, at every breath, and given the choice between life and death - always chooses death].
Mishima himself took his own life in a blaze of gory glory - it was his crowning artistic achievement!
Nietzsche says in Zarathustra that;
"One must Die at the right time".

This is taken as advocacy for euthanasia, and was certainly suggestive to the s.

So. in brief I would say that the thought of suicide was a constant test, and ultimately death itself would be seen as 'suicide', in that the Superhuman type Wills his own life - and therefore his own DEATH - to the point of Amor Fati.