Descend from Heav'n Urania, by that name
If rightly thou art call'd, whose Voice divine
Following, above th' Olympian Hill I soare
Above the flight of Pegasean wing
The meaning, not the Name I call
from John Milton – Paradise Lost, Book 7 on Rap Genius
Meaning
Milton invokes a Christian muse, who lives in Heaven, which is way above the pagan gods just chillin on Mt. Olympus

“Urania” just means “heavens” in Greek, so he’s basically asking her to descend from herself, but whatever, “the Name” is less important than “the meaning,” which is that Milton is getting inspired by the divine power of God
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