"Some bearded meteor, trailing light,..."
See in text (Text of the Poem)
This simile, which compares Lancelot to a “bearded meteor,” elevates the knight almost to a force of nature. Combined with the imagery of the previous stanza, which compared Lancelot’s bridle to stars in the sky, Lancelot is given an otherworldly, celestial air that nevertheless stands in contrast to the Lady’s. His otherworldliness is defined by images of space—literally, not of this world—and hers by a much more mysterious ambiguity.