Another good specimen of scholastic Mysticism is the short treatise, _De adhærendo Deo_, of Albertus Magnus. It shows very clearly how the "negative road" had become the highway of mediæval Catholicism, and how little could be hoped for civilisation and progress from the continuance of such teaching. "When St. John says that God is a Spirit," says Albert in the first paragraph of his treatise, "and that He must be worshipped in spirit, he means that the mind must be cleared of all images. When thou prayest, shut thy door--that is, the doors of thy senses ... keep them barred and bolted against all phantasms and images.... Nothing pleases God more than a mind free from all occupations and distractions.... Such a mind is in a manner transformed into God, for it can think of nothing, and understand nothing, and love nothing, except God: other creatures and itself it only sees in God.... He who penetrates into himself, and so transcends himself, ascends truly to God.... He whom I love and desire is above all that is sensible and all that is intelligible; sense and imagination cannot bring us to Him, but only the desire of a pure heart. This brings us into the darkness of the mind, whereby we can ascend to the contemplation even of the mystery of the Trinity.... Do not think about the world, nor about thy friends, nor about the past, present, or future; but consider thyself to be outside the world and alone with God, as if thy soul were already separated from the body, and had no longer any interest in peace or war, or the state of the world. Leave thy body, and fix thy gaze on the uncreated light.... Let nothing come between thee and God.... The soul in contemplation views the world from afar off, just as, when we proceed to God by the way of abstraction, we deny Him, first all bodily and sensible attributes, then intelligible qualities, and, lastly, that _being_ (_esse_) which keeps Him among created things. This, according to Dionysius, is the best mode of union with God." Bonaventura resembles Albertus in reverting more decidedly than the Victorines to the Dionysian tradition. He expatiates on the passivity and nakedness of the soul which is necessary in order to enter into the Divine darkness, and elaborates with tiresome pedantry his arbitrary schemes of faculties and stages. However, he gains something by his knowledge of Aristotle, which he uses to correct the Neoplatonic doctrine of God as abstract Unity. "God is 'ideo omnimodum,'" he says finely, "quia summe unum." He is "totum intra omnia et totum extra"--a succinct statement that God is both immanent and transcendent. His proof of the Trinity is original and profound. It is the nature of the Good to impart itself, and so the highest Good must be "summe diffusivum sui," which can only be in hypostatic union.