God Exist?

How can God exist?

Because God is outside of space, time and matter.

I understand your question "how can a God be outside the universe? How can we know he exists?" An atheist will say we CAN’T know anything outside our universe. How can he be certain of that? 

Christians are “reasoning” from effect to cause. There are things that transcend the universe, like for instance, the laws of logic. From the data that’s well known, space, matter and time has a beginning. Then whatever creates space, matter and time would have to TRANSCEND space, matter and time. Spaceless, timeless, and immaterial. This is inherently true because if space, matter and time had a beginning then whatever created it can’t be made of it, because there was initially no space, matter and time. That’s why.

Atheist Answers

Science; Christian Founders

What is the Gospel