Theology as wisdom is at once eminently speculative and eminently practical because the God who is the object of the study of theology is the God who intervenes in human history and calls us to perfection and salvation. Spiritual theology reflects precisely on the mystery of our participation in divine life. It is concerned not only with the construction of a science or theory of the supernatural life, but also with the existential condition of that life in the individual Christian. Consequently, spiritual theology must express itself in both ontological (theory) and psychological (experiential) terms.
Because spiritual theology is part of the one theology, it is closely related to dogmatic and moral theology, from which it derives its principles. And because it is an applied theology, it necessarily contains much that is practical and experiential. Consequently, the method of theologizing must take both of these factors into account; it must, in fact, combine the deductive method and the inductive method and strive to keep a proper balance between the two. –Father Jordan Aumann ‘Spiritual Theology’