No problem
I've always thought that shall implies a greater degree of certainty. So it’s generally not appropriate to us for others except in commands and things like that. Seems I was kind of close to the real usage.
That R’lyeh shall be thrown back in the sea was some kind of divine declaration. Or wishful thinking
I concider to help everyone, yes, even myself. I assure you that this desicion was not made rashly (or at least I gave some thought to it). And now I can of course pretend im making completely unselfish acts .