Believing that an all-powerful God should answer my silly questions is arrogance beyond megalomania. Believing that a finite human mind could make any sense of the eternal plan of a God who is outside of time and space absurdly places limits on an unlimited God. Maybe it's just "mysterious ways" phrased differently, but it's pretty rational.*
If you really want a good discussion on this topic, Dobson has a great book called "When God doesn't make sense."
Amazon has it used from $2.99. Easy read -- worth about one solid afternoon, and very well-researched discussion of "mysterious ways."
Dan
*Yes, Stu, I mean "rational" assuming you believe in God. If you don't believe in God, then asking any question at all of a non-existent deity is irrational. Heck, if you don't believe in God, even believing in God is irrational.