  A miracle (from the Latin mirari, to wonder), at a first and very rough approximation, is an event that is not explicable by natural causes alone. A reported miracle excites wonder because it appears to require, as its cause, something beyond the reach of human action and natural causes. Historically, the appeal to miracles has formed one of the primary lines of argument in favor of specific forms of theism, the argument typically being that the event in question can best (or can only) be explained as the act of a particular deity.