Many religions, and Christianity in particular, speak of a deity as [View all]
a real thing that exists. Christianity claims that its deity appeared on Earth in human form, died, and ascended into Heaven. They claim that their "savior" still lives and is part of their lives.
And yet, no human can see a deity. Even Moses, the patriarch of Judaism and Christianity, claimed to only have seen God's hind parts. But, that's written in very, very old writings, and can't be supported by evidence.
Nobody has seen any deities. Nobody can present any evidence of their existence. Still, many religious speak of their deity or deities as though they were real and present. For many people, that is simply not adequate information to demonstrate that any deities exist. So, they do not believe such entities exist at all and are simply figures of mythology. Many of those people would gladly believe that a deity exists if they were presented with even a little tangible evidence.
Instead, what is presented is something called "faith." That is the evidence we are expected to take as proof. Faith, which is defined in one scripture as "the substance of things hoped for, the evidence of things not seen." In other words, evidence of nothing at all. So, we do not believe. We cannot believe.