觀無量壽佛經義疏 3.76

3.76

"[The Buddha said:] 'On the crown of his head is an uṣṇīṣa.'" Second, contemplating the light, which has two parts: first, the light of the crown; second, the light of the body. First, the light of the crown, which has two parts: first, the measure of the light; second, the transformations within the light. First, the measure of the light.