Why does God exist?

Answer:

God told Moses to tell the people “I AM that I AM” sent me.

This literally means I AM the one that causes all other things to be…

The true purpose of God and His eternal nature is love…that is what God did for the eons of time before there was anything else and what He will be doing in a billion years…but God is also a Creator and thus brought all things that we know or will ever know into existence.