what power does shelly want from the skylark into a skylark

Percy really liked his Skylark. The bird takes on the metaphorical energy of nature,” like a poet hidden / In the light of thought,” the bird reconnects us with the nature that we seem to shut out, “sympathy with hopes and fears it heeded not.” There is a permanence of joy, almost like the Skylark has transcended sadness. The speaker asks the bird for "sweet thoughts" from its "rapture so divine". The bird seems to have the power to lend its sweetness to the speaker if only for awhile.