Two or three specimens will suffice. Gerson gives the two following definitions of the Theologia Mystica:—‘Est animi extensio in Deum per amoris desiderium.’ And again: ‘Est motio anagogica in Deum per purum et fervidum amorem.’ Elsewhere he is more metaphorical, describing it as the theology which teaches men to escape from the stormy sea of sensuous desires to the safe harbour of Eternity, and shows them how to attain that love which snatches them away to the Beloved, unites them with Him, and secures them rest in Him. Dionysius the Carthusian (associating evidently mystica and mysteriosa) says,—‘Est autem mystica Theologia secretissima mentis cum Deo locutio.’ John à Jesu Maria calls it, ‘cœlestis quædam Dei notitia per unionem voluntatis Deo adhærentis elicita, vel lumine cœlitus immisso producta.’ This mystical theology, observes the Carthusian Dionysius, farther, (commentating on the Areopagite), is no science, properly so called; even regarded as an act, it is simply the concentration (defixio) of the mind on God—admiration of his majesty—a suspension of the mind in the boundless and eternal light—a most fervid, most peaceful, transforming gaze on Deity, &c.
All alike contrast the mystical with the scholastic and the symbolical theology. The points of dissimilarity are thus summed up by Cardinal Bona:—‘Per scholasticam discit homo recte uti intelligibilibus, per symbolicam sensibilibus, per hanc (mysticam) rapitur ad supermentales excessus. Scientiæ humanæ in valle phantasiæ discuntur, hæc in apice mentis. Illæ multis egent discursibus, et erroribus subjectæ sunt: hæc unico et simplici verbo docetur et discitur, et est mere supernaturalis tam in substantiâ quam in modo procedendi.’—Via Compendii ad Deum, cap. iii. 1-3.
The definition given by Corderius in his introduction to the mystical theology of Dionysius is modelled on the mysticism of John de la Cruz:—‘Theologia Mystica est sapientia experimentalis, Dei affectiva, divinitus infusa, quæ mentem ab omni inordinatione puram, per actus supernaturales fidei, spei, et charitatis, cum Deo intime conjungit.’—Isagoge, cap. ii.
The most negative definition of all is that given by Pachymeres, the Greek paraphrast of Dionysius, who has evidently caught his master’s mantle, or cloak of darkness. ‘Mystical theology is not perception or discourse, not a movement of the mind, not an operation, not a habit, nothing that any other power we may possess will bring to us; but if, in absolute immobility of mind we are illumined concerning it, we shall know that it is beyond everything cognizable by the mind of man.’—Dion. Opp. vol. i. p. 722.
In one place the explanations of Corderius give us to understand that the mysticism he extols does at least open a door to theosophy itself, i.e. to inspired science. He declares that the mystical theologian not only has revealed to him the hidden sense of Scripture, but that he can understand and pierce the mysteries of any natural science whatsoever, in a way quite different from that possible to other men—in short, by a kind of special revelation.—Isagoge, cap. iv.
The reader will gather the most adequate notion of what is meant, or thought to be meant, by mystical theology from the description given by Ludovic Blosius, a high authority on matters mystical, in his Institutio Spiritualis. Corderius cites him at length, as ‘sublimissimus rerum mysticarum interpres.’
Happy, he exclaims, is that soul which steadfastly follows after purity of heart and holy introversion, renouncing utterly all private affection, all self-will, all self-interest. Such a soul deserves to approach nearer and ever nearer to God. Then at length, when its higher powers have been elevated, purified, and furnished forth by divine grace, it attains to unity and nudity of spirit—to a pure love above representation—to that simplicity of thought which is devoid of all thinkings. Now, therefore, since it hath become receptive of the surpassing and ineffable grace of God, it is led to that living fountain which flows from everlasting, and doth refresh the minds of the saints unto the full and in over-measure. Now do the powers of the soul shine as the stars, and she herself is fit to contemplate the abyss of Divinity with a serene, a simple, and a jubilant intuition, free from imagination and from the smallest admixture of the intellect. Accordingly, when she lovingly turns herself absolutely unto God, the incomprehensible light shines into her depths, and that radiance blinds the eye of reason and understanding. But the simple eye of the soul itself remains open—that is thought, pure, naked, uniform, and raised above the understanding.
Moreover, when the natural light of reason is blinded by so bright a glory, the soul takes cognizance of nothing in time, but is raised above time and space, and assumes as it were a certain attribute of eternity. For the soul which has abandoned symbols and earthly distinctions and processes of thought, now learns experimentally that God far transcends all images—corporeal, spiritual, or divine, and that whatsoever the reason can apprehend, whatsoever can be said or written concerning God, whatsoever can be predicated of Him by words, must manifestly be infinitely remote from the reality of the divine subsistence which is unnameable. The soul knows not, therefore, what that God is she feels. Hence, by a foreknowledge which is exercised without knowledge, she rests in the nude, the simple, the unknown God, who alone is to be loved. For the light is called dark, from its excessive brightness. In this darkness the soul receives the hidden word which God utters in the inward silence and secret recess of the mind. This word she receives, and doth happily experience the bond of mystical union. For when, by means of love, she hath transcended reason and all symbols, and is carried away above herself (a favour God alone can procure her), straightway she flows away from herself and flows forth into God (a se defluens profluit in Deum), and then is God her peace and her enjoyment. Rightly doth she sing, in such a transport, ‘I will both lay me down in peace and sleep.’ The loving soul flows down, I say, falls away from herself, and, reduced as it were to nothing, melts and glides away altogether into the abyss of eternal love. There, dead to herself, she lives in God, knowing nothing, perceiving nothing, except the love she tastes. For she loses herself in that vastest solitude and darkness of Divinity: but thus to lose is in fact to find herself. There, putting off whatsoever is human, and putting on whatever is divine, she is transformed and transmuted into God, as iron in a furnace takes the form of fire and is transmuted into fire. Nevertheless, the essence of the soul thus deified remains, as the glowing iron does not cease to be iron....
The soul, thus bathed in the essence of God, liquefied by the consuming fire of love, and united to Him without medium, doth, by wise ignorance and by the inmost touch of love, more clearly know God than do our fleshly eyes discern the visible sun....
Though God doth sometimes manifest himself unto the perfect soul in most sublime and wondrous wise, yet he doth not reveal himself as he is in his own ineffable glory, but as it is possible for him to be seen in this life.—Isagoge Cord. cap. vii.