I often hear or read about people who say that something is "for reasons they cannot comprehend or explain".

Are there actually things or concepts that the human brain "cannot possibly comprehend"?

I don't really know where I'm going with this but this is infinitely interesting to me. I was thinking, if something cannot be understood by the human mind, then is it in a way nonexistent?

I really don't know, but I plan on exploring this further!