Art’s purpose is to move the viewer to a space
where there are no words.
To the viewer:
Viewing doesn't happen just with your eyes, so this goes for all mediums: writing, music or any art where you are a participant in the artist’s world, even if you don't understand it.
To the artist:
For a moment you have taken your viewer to a place of the void where there is just you and them, dialoguing in the ether.
This is what good art does.