Pashuteh Yid – “Finally, I believe that the RBSH rules the world, period. I do not understand what role could be played by sheidim, for example. If ploni is righteous, then Hashem will treat him well. If not, then he may get in trouble CV. However, how will his plight be affected by a sheid for good or for bad?”
Very simple – the Sheidim would be an instrument of punishment in the hands of Hashem, just like health/parnasseh problems and every other type of misfortune are.
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Sister Bear – “But there must be something about Segulos, if they’re brought down by different Gedolim.”
Segulos are real, as Mod-80 explained. However, that may only be the case if one has the right intentions, which is probably rarely the case these days. And either way, segulos were meant to support tefillah, teshuva, and tzdakah, not to replace them.