Well, before our own birth, we do just at some stage magically appear to ourself from obscurity, like we feel we are alive at some point as our body develops, and we start having thoughts which looking back can be really alarming, like when did i decide I was alive..? maybe never it was just a miracle of life like a new flower blooming from a seed pod that fell and it was just luck all the right elements were there for it to exist, so in saying that when did the world get created, when we are born to us and we are aware of its existence, or was there some force that was born that created the world in some beginning? I suppose you could say how can anything really have a beginning, because we are born as a new thing, but from darkness and obscurity but brought into a light and a world of things and materials and elements which help create us, so perhaps existence just always was, and it is why we can believe we have the gift of eternal life if we are good to the life force and help nurture it, it might be our purpose. To try and work it all out might not be really why.. just more to love it all and learn about our life and enjoy it.