Sentence:  But while he jested thus, / A thought <WSD>flashed</WSD> through me, which I clothed in act. / Remembering how we three presented Maid, / Or Nymph, or Goddess, at high tide of feast, / In masque or pageant at my father's court. 
Meaning of the word marked with <WSD> tags:  To break forth like a sudden flood of light; to show a momentary brilliance.