Answer:
The title of John Milton's poem "On His Blindness" is justified by the poem's central theme, which revolves around Milton's personal struggles with his blindness and his reflections on how this affliction may impact his ability to serve God. The title encapsulates the essence of the poem, as Milton grapples with feelings of frustration, despair, and a sense of his own limitations in the context of his blindness. Throughout the poem, he explores the spiritual and existential implications of losing his sight and contemplates whether God requires active, visible service or if inner faith and devotion are equally valued. The title, "On His Blindness," succinctly conveys the focus of the poem on Milton's introspective examination of his own blindness and its potential impact on his relationship with God.