So spake the false dissembler unperceived; For neither man nor Angel can discern Hypocrisy, the only evil that walks Invisible, except to God alone, By his permissive will, through Heaven and Earth; And oft, though Wisdom wake, Suspicion sleeps At Wisdom’s gate, and to Simplicity Resigns her charge, while Goodness thinks no ill Where no ill seems: which now for once beguiled Uriel, though regent of the sun, and held The sharpest-sighted Spirit of all in Heaven; Who to the fraudulent impostor foul, In his uprightness, answer thus returned: