Creative work is not a selfish act or a bid for attention on the part of the actor. It's a gift to the world and every being in it. Don't cheat us of your contribution. Give us what you've got.
Is there a spiritual element to creativity? Hell, yes. Our mightiest ally (our indispensable ally) is belief in something we cannot see, hear, touch, taste, or feel.
F@*# self-doubt. I despise it. I hold it in contempt, along with the hell-spawned ooze-pit of Resistance from which it crawled. I will NEVER back off. I will NEVER give the work anything less than 100%. If I go down in flames, so be it. I'll be back.