救度學 凡聖不二 三世心 一念三千 一多相即 理事無礙 三世互相見 九世不離當念 不常不斷 Soteriology Non-duality between the sacred and profane The three periods of time in mental activity One instant of mental activity involving the three-thousand worlds Non-obstruction between principle and things The structure of nine periods is inseparable from one instant of mental activity