Our universe is thought to have begun as an infinitesimally small, infinitely hot, infinitely dense, something - a singularity. Where did it come from? We don't know. Why did it appear? We don't know.
for God is one
In the beginning God created the heavens and the earth.
In subjecting all things to him, he left nothing not subject to him.
Thus says God the LORD, Who created the heavens and stretched them out, Who spread out the earth and its offspring, Who gives breath to the people on it and spirit to those who walk in it.
Where were you when I laid the foundation of the earth? Tell Me, if you have understanding.