法華玄論 9.65

9.65

Answer: Clarifying the multitude of the assembly from the lower region demonstrates that he attained buddhahood long ago; therefore, those whom he has transformed are numerous. A tree has the meaning of establishment: here it clarifies opening the jewelled stūpa to establish the dharmakāya. Formerly, out of fear that beings would give rise to slander, the longevity of his lifespan could not be revealed; now, since the conditions of the Path have arisen, he rejoices without fear. This is why he sits on a lion throne under a tree.