"Imagination is the instrument of THE ADAPTATION OF THE WORD. Imagination applied to reason is genius. Reason is one, as genius is one, in all the variety of its works. There is one principle, there is one truth, there is one reason, there is one absolute and universal philosophy. Whatsoever is subsists in unity, considered as beginning, and returns into unity, considered as end. One is in one; that is to say, all is in all. Unity is the principle of numbers; it is also the principle of motion and consequently of life., The entire human body is recapitulated in the unity of a single organ, which is the brain. All religions are summed up in the unity of a single dogma, which is the affirmation of being and its equality with itself, and this constitutes its mathematical value. There is only one dogma in Magic, and it is this: The visible is the manifestation of the invisible, or, in other terms, the perfect word, in things appreciable and visible, bears an exact proportion to the things which are inappreciable by our senses and unseen by our eyes. The Magus raises one hand towards heaven and points down with the other to earth, saying: ‘Above, immensity: Below immensity still! Immensity equals immensity.’ – This is true in things seen, as in things unseen."
Eliphas Levi “Dogme et Rituel de la Haute Magie” (Part I: The Doctrine of Transcendental Magic, The Candidate, Rowe pg. 6-7)