What does a materialist need mysticism for?
I don't have a good answer for you; however, while describing the interactions of clouds of particles can be beautiful in its own right, I can't help but get lost in the sublime when faced with a golden sunrise or the laughter of an infant when they discover something new. I cannot help making chicken soup as a potion of good health or saying a prayer in the face of agony. Maybe there's no material soul but the universe sees itself through our eyes.