If you believe in God as
Ramanujan (one of my favorite mathematicians) did, you might believe that Math is discovered.
Ramanujan, a devout Hindu, unabashedly claimed that he frequently conversed with God (Brahman, in the aspect of Ramanujan’s family goddess, Namagiri), and that these conversations were always in purely mathematical form, without words in any natural language. More, he claimed that God told him that Math was His native language, which He had to translate into the “lesser” languages of non-mathematicians. (From the above wikipedia link) ‘He often said, "An equation for me has no meaning, unless it represents a thought of God."’
Ramanujan repeatedly drove his English colleagues, who tended to be dedicated atheists, crazy, when they asked him how he arrived at a particular, apparently correct but unproven result, and he replied that God had given it to him in a dream.
I’m neither a devout theist, nor anywhere near Ramanujan’s mathematical caliber, but at times when I’ve been long and heavy into Math, I recall dreaming in it, some of the most pleasant dreams I’ve ever had.