The language of art and literature

I think art and literature need to use a language most people can understand to allow the cultural communication to take place, otherwise art may communicate only to the few, as does much of modern art and literature where you have to first know the arcane language, the overall culture be dammed.

For me this means evolutionary realism, poetic realism, not unlike idealistic classical realism yet steeped in naturalism as studied by sociobiology, that is,  real nature, real human nature, but with the subjects infused with the upward climb of evolution toward Godhood, and with Godhood portrayed as the beautiful supermaterial zenith of material evolution, if that can be done. This way religious art remains ultimately the highest form of art, as an affirmation of the sacred.