The intellect of man is forced to choose Perfection of the life, or of the work, And if it take the second must refuse A heavenly mansion, raging in the dark. When all that story's finished, what's the news? In luck or out the toil has left its mark: That old perplexity an empty purse, Or the day's vanity, the night's remorse. -W.B Yeats Alongside The Song of Wandering Aengus, this poem of Yeats’ is my favorite, and I think the most indicative of his perennial concerns.
Arvo Pärt also expresses well what you're getting at here
https://vimeo.com/221011528
Wonderful. I hope his musical diaries are published someday.