Ode to the West Wind: Separation between humans and nature

We discussed in class the lines in "Ode to the West Wind" in which Shelley compares his torments to those of Jesus on the cross ("I fall upon the thorns of life! I bleed!") as potentially tasteless, and a footnote in the book calls the comparison "risky." However, I thought that the comparison Shelley makes next is even more of a stretch, as he compares himself to the West Wind itself in line 55-6: "A heavy weight of hours has chained and bowed/One too like thee--tameless, and swift, and proud." On first read-through, the comparison didn't seem particularly presumptuous, but as I considered it I realized the magnitude of Shelley's statement here. At least Jesus was a human; in comparing himself to the West Wind, Shelley takes for himself the force and power of nature itself.
Shelley's comparison is more complex than a simple boast, though. In referring to the "heavy weight of hours," Shelley highlights his own greatest weakness compared to the wind (mortality), and implies a further flaw in that he is "too like" the West Wind.
The following stanza (the fifth) provides an interesting further development of Shelley's awareness of his own mortality, and a surprising (to me) honesty about his poetry. In exhorting the wind to "Make me thy lyre" (line 57), he acknowledges that his poetry ("dead thoughts," his lasting legacy to the world, as presumably he would have expected) required the wind's assistance to be spread "among mankind" (line 67), and that furthermore the words he wrote did not come from him alone but were instead the words of the wind itself passing through him. All this could still not exactly be called humble, of course, but it is a more interesting sentiment than simple boasting (and more poetic to boot).