Canto xxvii. opens with a tremendous invective, put into the mouth of St. Peter, against the corruption of the Papacy; a passage which incidentally contains an important piece of evidence with regard to the date at which the later cantos of the _Paradise_ were written. A bitter allusion to “men of Cahors” can have been evoked only by the election of John XXII., who was from that city; and he became Pope in 1316. After this the whole multitude of Saints ascend to the highest heaven; but before Dante follows, Beatrice makes him look down once more, and he perceives that since his entry into this sphere he has moved with the diurnal rotation through an arc of forty-five degrees. Then they ascend into the sphere of the First Motion, where place and time no longer exist. From its movement time is measured; and its place is in the Divine intelligence only. Here the Empyrean, or highest Heaven, comes into view; at first as a point of intense brilliancy round which nine circles are revolving. These represent the Angelic hierarchies, and their places with regard to the central point are in inverse order to that of the spheres which they move. Beatrice takes occasion from them to instruct Dante upon some points relating to the creation and functions of the angels, and incidentally, upon the creation of form and matter, and their combination in the visible universe. The passage (Canto xxix.) is difficult; but is so magnificent in its diction as to deserve careful study. Dante has nowhere else succeeded so completely in clothing with poetry the dry bones of scholastic theology. The discussion, by dealing with several disputed points, gives occasion for some stringent remarks on the preachers of the time. They now rise to the highest heaven, outside of all the spheres, in which all the blessed have their true place. At first Dante is aware of light only, but gradually a fresh power of sight comes to him, and he sees a river, from and to which bright sparks are ever issuing and returning. The banks are brilliant with flowers. At the command of Beatrice he bows down and drinks, and at once sees the river as a lake of light, the flowers on the banks as concentric rows of saints seated on thrones, and the flitting sparks as angels. At this point Beatrice leaves Dante, after a few scathing words in reference to the “covetousness”[38] of the Papacy, which has put the world out of joint--words which may be taken as summing up in brief all the passages throughout the poem in which political affairs are touched upon. With this, if we except one bitter jibe at Florence (xxxi. 39) all controversial matters are dismissed, and the last three cantos of the poem are devoted to a description, rising ever in sublimity, of the joys and mysteries of Heaven.