The moral? I mean, Yu's intentions weren't 'bad' persay... fuled by anger, perhaps... misguided even. Seems that the teachings were corrupted though, and of course, the truth hidden...

But in anycase, the fayth sent in a 'memory' or dream that was crucial to stopping the summoning of the dream, which apparently was cuasing the fayth to be .. tired? Not at rest, whatever. Why was Tidus brought out of the dream?