mysticism

noun
  1. the belief that direct knowledge of God, spiritual truth, or ultimate reality can be attained through subjective experience such as intuition or insight
  2. Usage: religious; philosophical
  3. a system of contemplative prayer and spirituality aimed at achieving unity with or absorption into the Deity or the absolute
  4. Usage: religious
  5. vague or ill-defined religious or spiritual belief, especially when regarded as irrational or groundless
  6. Usage: often disapproving

Examples