At Prayer in Shrine
This universe has a finite size at any moment since its birth from the so-called vacuum.
It is 13.7 billion years old and its width is said to be about 40 billion light-years.
This physical universe, at one of whose corners our solar system is situated, is not infinite, though it is expanding toward the infinite.
On the other hand, the spiritual universe seems infinite, though our mental ability to imagine the expansion of the spiritual universe is so limited. We really can't understand how old and how large the spiritual universe is. But one thing sure is our mind belongs to this universe more than the physical universe.
And God is the sole creator of both the universes. For this reason, it is very deplorable that we cannot see God in either of the universes. You haven't probably seen God in material environments and in your minds. It must be very disappointed, if you admit existence of God.
But even in Japan some people try to see God, a god, or any favorable gods in a shrine, so that they occasionally visit a shrine to pray at an altar in the sanctuary. They join their hands in prayer while closing the eyes to see an image of a god, making a wish.
Of course, you may pray to God in a Christian church. Probably God wouldn't care.
The Kingdom of God is near to believers wherever they may be.
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Mat 12:10 And, behold, there was a man which had his hand withered. And they asked him, saying, Is it lawful to heal on the sabbath days? that they might accuse him.
Mat 12:11 And he said unto them, What man shall there be among you, that shall have one sheep, and if it fall into a pit on the sabbath day, will he not lay hold on it, and lift it out?