These questions are practically impossible to answer in a way that would satisfy the human intellect. The only answer I’ve found that is remotely satisfying is from a Pasuk in Yeshaya Perek nun-hey, Pasuk Ches (which is leined as the Haftara on every Ta’anis Tzibur at Mincha): “Ki Lo Machshevosai Machshevoseichem, v’Lo Darkeichem Derachai, Ne’um Hashem” – “For my thoughts are not as your thoughts, and your ways as my ways, says Hashem”.
In other words, not everything can be fully understood – we can accept that there are some things that are beyond our understanding. We can, of course, try to understand – but I can accept that there are some things that I just won’t get. After all, there are still many mysteries of the natural world that modern science has not explained – why should all the mysteries of the metaphysical world need to be resolved for me to accept it?
an Israeli Yid (presently in the US, where it’s not yet Shabbos)