The problem with postulating a beginning from my pov is this leaves the
question of 'what was before the beginning ad infinitum. To avoid getting
involved too deeply in the fractalization of the cosmos it seems more
practical to see the cosmos as a unity the outside of which, again from a
practical pov is non-existence. The analysis of non-existence should perhaps
be seen as a mental exercise by existence to increase its complexity and
could be seen as a conceptual increase in the size of the cosmos as
presumably non-existence will have no objections to being taken over by
existences as if it did it would then be existence:-) This is in no way
meant to imply that on a local level compression and violent expansions,
have not, are and will not occur and that some state changes will give the
impression of difference. A more productive path might be looking into the
very strong possibility that existence/events can be both generated and
cancelled as this also tends to answer the beginning question:-)