People often think that in Buddhism “supramundane” means “leaving home to be a monk”. Actually this is a misunderstanding originating from the original Buddhist era. This misunderstanding counterposes the "being at home" and "leaving home", "social life" and "forest temple". The spirit of leaving home in Hinayana Buddhism breaks the binary opposition, namely "leaving home" is not spatial transferrence or identity conversion. However it views “afflictions” and “Bodhi”, “Samsara” and “Nirvana” as two opposites. Mahayana Buddhism further breaks down the false ego. It fundamentally achieves the non-duality between “afflictions” and “Bodhi”, “Samsara” and “Nirvana”,“saving self”and “saving others”. In Mahayana Buddhism, “supramundane” is the nature of “getting into the world”, and “getting into the world” is the function of “supramundane”. We can conclude that “supramundane” is just “getting into the world”, and “getting into the world” is just “supramundane”.