If you understand this you understand everything – there are only three realities; the first of course is God, who is infinite, which means not he is something that is infinite, rather he is “nothing” which is infinite (so his infinity is not defined, rather it’s a potential for anything;) Then there are many many universes, which as the foundational book of Kabbalah teaches, are comprised primarily of three dimensions: space, time (the location and time-continuum of the universe) and souls, the Beings that can perceive – And ultimately it boils down to the fact, that God chose to create us (Yidden) in order, that with our very simple perception, we should learn to love, hence integrate God in us (Dirah Bitachtoinim)