He vowed before Lokesvararaja that once he did, the Western paradise under his jurisdiction would have no hell, no ghosts, and no beasts and that all sentient beings of the Buddhist realms could be reborn in that world and live a blissful life without worry or care.
法藏潛心修行，立願要成佛，他在世自在王佛面前許願，在他成佛以後，所管轄的西方淨土，不會有地獄、餓鬼、畜牲，佛國眾生都可以轉生到這個世界，過著不愁吃穿、沒有任何苦惱的自在生活。