Who is the speaker in the poem, Let This Darkness Be a Bell Tower?

Unlike many lyric poems, the speaker is almost entirely absent from this sonnet. Instead, the speaker places his focus on the addressee, giving them encouragement and instructions over the course of the poem. The speaker clearly cares for the addressee and wants to provide a sense of comfort to them, but it is likely that the speaker is supposed to be addressing humanity in general rather than a particular person.