 When it comes to the means (k) of revelation, philosophical reflection can either consider a priori possibilities for how revelation might proceed, or study ideas and claims about revelation found in a particular religious tradition, such as Christianity. Perhaps it is most fruitful to combine analysis of religious claims with conceptual or metaphysical reflection in order to map the possible means of divine revelation. Using this kind of method, William Abraham has described revelation as a “polymorphous concept” like “teach” and “farm” (Abraham 1997: 206). Just like one can teach by doing a variety of different concrete things (lecturing, using pictures or models, grading papers, etc.), so God could reveal by doing many different things, such as speaking, doing “might acts” in history, causing dreams, visions or other experiences, or “making Himself present and manifesting Himself” by means of an incarnation (Vatican II, Dei Verbum § 4).