In "A Very Old Man with Enormous Wings," the turning point that leads to the outcome is when the spider woman appears and the townspeople become more interested in her, neglecting the old man with wings. This marks a shift in the story, as the old man is no longer the center of attention and is instead pushed to the sidelines. The spider woman's appearance also marks a shift in the townspeople's attitudes towards the supernatural, as they become more accepting of her and less interested in the old man.
In "Sonnet for Heaven Below," there is no clear turning point that leads to the outcome, as the poem is more of a meditation on the speaker's relationship with God and their own mortality. The poem is structured as a sonnet, with a volta or turn in the final two lines, but this turn is more of a reflection on the speaker's own mortality and the inevitability of death.