The Three Dharma Seals1 are the keys we can use to enter the Three Doors of Liberation — emptiness (shunyata), signlessness (animitta), and aimlessness (apranihita). All schools of Buddhism accept the teaching of the Three Doors of Liberation.2 These Three Doors are sometimes called the Three Concentrations.3 When we enter these doors, we dwell in concentration and are liberated from fear, confusion, and sadness.
