Mysticism, the Chinese translation of the word, is easily confused with mysticism. In this regard, Fu Peirong, a famous scholar in Taiwan Province Province, thinks that mysticism should be translated into "mysticism". The secret contract is very appropriate. In secret doctrine, a key concept is "secret behavior experience", that is, the spiritual experience of feeling that one's soul is in harmony with a supreme spiritual entity.

Shen Dianzhong divided mysticism into three types: one is religious mysticism, which mainly refers to religious belief in gods; The second is mysticism in a broad sense, which mainly refers to people's belief in God in daily life; The third is cult mysticism or heretical mysticism, that is, a mysticism related to cult organizations. The common feature of all kinds of mysticism is the epistemology and methodology of the practical process of "rejecting perceptual knowledge to rational knowledge"