As for 'what are phases' to try and keep it as simple as possible, imagine that we are not the only universe, but that there are countless universes, and not only do they happen at the same time as ours, but they happen in the samE place. Everything in our universe has a set frequency, so we can see it, feel it ect. However there are also other frequencies that we can not detect.
Take for example a radio. If you have it set to 'channel one radio' that is all the radio can detect. But if you change the frequency you can detect other radio stations, but then you lose 'channel one radio'.
The sum of all this is what if items could change their frequency, to us they would disapear, but they would still be where they are, just on a different frequency.
It's quite difficult to try and explain in words but sure YouTube can provide much better ezplinations, tis truly amazing and awe inspiring to think about.
Also as far as god and phases goes (also known as string theroy or chaos theroy) there is a universe for every possibility of chance and probibility, so why would a god create such a system? And what effect would that have on heaven and hell ect.
Also if we can prove this theroie then you can also give a reason for the big bang, the fusion of phases, and you may say that all of this relies on chance, but when you have an unlimited number of chances and an unlimited time to do it in then the odds are really very good, infact they're certain.