 William James asked: “Do mystical states establish the truth of those theological affections in which the saintly life has its roots?” (1958, 415). This question can be divided into two: (Q1) Is a mystic warranted in thinking that his or her experiences are veridical or have evidential value? A mystical experience may be psychologically compelling for the person who had it, but is it also cognitively authoritative? And (Q2), are those who have not undergone any mystical experience, upon examining the evidence presented by mystics, warranted in thinking them veridical or endowed with evidential value? The major philosophical reply in the affirmative to Q1 is called the “Doxastic Practice Approach.” The major defense of an affirmative reply to Q2 is called the “Argument from Experience.”