...moreover, where so many adventurers have so miserably miscarried. So much the rather, thou celestial light, Shine inward, and the mind through all her powers Irradiate. There plant eyes ; all mist from thence Purge and disperse ; that I may see and tell Of things invisible to mortal sight *....

...me expunged and razed, And wisdom at one entrance quite shut out. So much the rather thou celestial Light Shine inward, and the mind through all her powers Irradiate, there plant eyes, all mist from thence Purge and dispense, that I may see and tell Of things invisible to mortal sight. [3.37-55]...