William Wordsworth has reported that this poem was "was in fact suggested by my daughter Catharine long after her death." The poem's mystic musing reveals the speaker's soul craving.
https://owlcation.com/humanities/William-Wordsworths-Surprised-by-Joy
https://discover.hubpages.com/literature/edgar-lee-masters-andy-the-night-watch
Edgar Lee Masters’ "Andy the Night-Watch"