四門

The four doors, schools of thought, or theories: 有 is the phenomenal world real, or 空 unreal, or both, or neither According to the Tiantai school each of the four schools 四教 in discussing these four questions emphasizes one of them, i. e. 三藏教 that it is real 通教 unreal, 別通 both, 圓通 neither; v. 有 and 空, and each of the four schools. In esoteric symbolism the 四門 are four stages of initiation, development, enlightenment, and nirvana, and are associated with E., S., W., and N.; with the four seasons; with warmth, heat, coolness and cold, etc.