Concept:The extract speaks of a final journey guided by God toward a “final call,” which points to the end of earthly life.Explanation:The speaker addresses God as “incomprehensible,” showing a religious or spiritual mood.“My pilot” refers to a guide or destiny leading the speaker.“Inborn stars” suggests fate or an inner guiding force.“Final call to thee” clearly refers to the moment of death, when the soul returns to God.Therefore, the theme is death.Answer:D. death.