mysticism

n. [ Cf. F. mysticisme. ] 1. Obscurity of doctrine. [ 1913 Webster ]

2. (Eccl. Hist.) 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. [ 1913 Webster ]

3. (Philos.) The doctrine that the ultimate elements or principles of knowledge or belief are gained by an act or process akin to feeling or faith. [ 1913 Webster ]