(1):

(n.) Obscurity of doctrine.

(2):

(n.) The doctrine of the Mystics, who professed a pure, sublime, and wholly disinterested devotion, and maintained that they had direct intercourse with the divine Spirit, and aquired a knowledge of God and of spiritual things unattainable by the natural intellect, and such as can not be analyzed or explained.

(3):

(n.) The doctrine that the ultimate elements or principles of knowledge or belief are gained by an act or process akin to feeling or faith.