URBAN IV, 1261-1264
The Object and Force of Rememorative Liturgical Action *
[From the Bull, “Transiturus de hoc mundo,” August 11, 1264]
5004 For other things whose memory we keep, we embrace in spirit and mind; but we do not for this reason hold their real presence. In this sacramental commemoration, however, Jesus Christ is present with us, under another form to be sure, but in His substance.