I work at a state institution, and in the US we have separation of church and state. I like that. Putting church and state together creates one institution with too much power, a theocracy as in Iran.
Still, no question there is a spiritual dimension to creative writing. There is a spritiual dimension to everything, even feeding the cat.
Pirsig, the other of Zen and the Art of Motorcyle Maintenance, seemed to argue, if I remember right, that striving for quality, the good, is a striving for God. Attempting to do anything the best you can is a spiritual exercise. So work on that poem. Work on that story. Strive toward greatness. It's a spiritual thing. You may be carrying on a converstation with energies above the human, with the ground of being, the mysterium--whatever you wish to call it. In indirect ways I try to imply that striving for good work is good for them, my students, without bringing in too much of the spiritual stuff.
I don't see writing as a career primarily, or as a means to make money, although I'm glad to make money. I encourage my students to write in order to understand themselves better, to explore their emotions, and when they share their work with others, they could be helping others and doing spiritual work.
I see writing as a calling. How many of your students do you see called to it? More than we might know. Even a student not planning to publish may continue to write and put out good energy into the universe by that writing. The student can continue to develop and become a better person through the practice of writing.