Simply Put
Out of nothing something is born.
The one becomes two
and the universe comes into being.
It changes and evolves over time
in such a way that the stage is set
for an organism to be born
that is self aware.
This organism in place,
the universe has what it needs
to experience itself
and to eventually come to know
the transcendence
of this illusory separateness.
To experience the two becoming one.
And what is the point of any of this ?
Think about the best experience
you have ever known in this life.
Now imagine this experience
as but a drop in the ocean
compared to the experience of
self realization,
and you will have the answer.