That a man shall not take ensample at the bodily ascension of Christ, for to strain his imagination upwards bodily in the time of prayer: and that time, place, and body, these three should be forgotten in all ghostly working.
".... For the perfection of this work is so pure and so ghostly in itself, that an it be well and truly conceived, it shall be seen far removed from any stirring and from any place.
"And it should by some reason rather be called a sudden changing, than any stirring of place. For time, place, and body: these three should be forgotten in all ghostly working.... And if it were possible, as it on nowise may be, yet it should be for abundance of ghostly working only by the might of the spirit, full far from any bodily stressing or straining of our imagination bodily, either up, or in, on one side, or on other. And therefore let be such falsehood: it should not be so."
Cloud of Unknowing - Christian Classics Ethereal Library