Gerard Manley Hopkins was a poet who often wrote about religion, so his poems featured themes of faith and doubt. John Henry Newman was previously an anglican priest had written a book on why he switched to Catholicism, which inspired Hopkins into converting to Catholicism as well. In 1966, he joined the Catholic Church under John Henry Newman, and in fact, Hopkins quickly became a priest. Before joining the Catholic Church, Hopkins was interested in writing, but he vowed not to write while he was a priest and he had burned all of his previous work. In 1875, however, he had chosen to write again after hearing of a shipwreck that ended up killing a majority of its passengers. 

As stated earlier, Gerard Manley Hopkins often wrote poems about faith and doubt. An example of one of these poems would be "No worst, there is none. Pitched past beyond grief." This poem is written from a dark place of the mind, as Hopkins begs God and Mother Mary for comforting and explains how there are frightful cliffs within the mind that are unfathomable, but at the end of this poem, Hopkins finds relief in the fact that we all go to sleep at the end of the day, and that one day we'll die and these awful thoughts of ours will no longer be dealt with. As far as religious themes go, there is a theme of doubt as the narrator begs for God's comforting in line three, asking where he could be. For the most part, Hopkins is speaking about how we shouldn't *have* to deal with dark thoughts or events, as they are like mountains that are unfathomable (lines 9-10). At the end of the day and despite the troubles we all face on a regular basis, we can rely on the fact that we will have to go to sleep at the end of the day as "each day dies with sleep" (line 14). While this poem comes across as Hopkins feeling afraid of his own mind, he adds a reassuring ending. As humans, we seek reassurance, and we may seek this out of even the simplest things such as just going to bed at the end of the day. After all, there's always tomorrow. 

Sources: 

"About Gerard Manley Hopkins." Poets, https://poets.org/poet/gerard-manley-hopkins.

Gerard Manely Hopkins. Before 1889. Wikimedia Commons, https://commons.wikimedia.org/wiki/File:GerardManleyHopkins.jpg.

Hopkins Manley, Gerard. "No worst, there is none Pitched past pitch of grief." The Norton Anthology of English Literature: The Victorian Age, edited by Stephen Greenblatt et al., 9 th ed., vol. E, W. W. Norton, 2012, pp. 729.