Spiritual formation currently lacks a robust epistemology. Christian theology and philosophy often spend more time devoted to an epistemology of propositions rather than an epistemology of knowing persons. This paper is an attempt to move toward a more robust account of knowing persons in general and God in particular. After working through various aspects of the nature of this type of knowledge this theory is applied to specific issues germane to spiritual formation, such as the justification of understanding spiritual growth (...) on an integrative and holistic (heart and mind) model, the reality of hearing God’s voice, and knowing his activity, as well as how such a theory should change the shape of sermons, evangelism, and apologetics. (shrink)