My wife and I were talking God at dinner and she came up with a very simple proof that it exists.
But first let's talk about an apple. An apple is the round fruit of a tree of the rose family, which typically has thin red or green skin and crisp flesh. If you find such a fruit then the apple exists.
Suppose we say that God is love and goodness. We don't deny that love and goodness exist. Therefore God exists.
I was referring to the idea of God being "just" a word. We would not call an apple "just a word," even if "apple" is a word. I bite into an apple and I taste it. It satisfies the conditions for something being real. I touch it. I can see it. I can smell it. I hear it squeak as I run my hand over it. As much as something is real it is real.
With God, it is the same. My senses all tell me that love and goodness prevail. I see evidence of them in every moment. If God is love and goodness, then it exists, just like an apple.
All things are "just" a word. What more can a thing be? The word "just" was unfair. Am I "just" a human being? I might be "just" a human being if I knock on a door and someone fears that a hungry lion is at the door. Then the word "just" is warranted. But that word doesn't make me less than a human. In fact, that may be all I can be. And "goodness and love" may be all that God can be ... and not a mean accomplishment either.