說無垢稱經疏 2.260

2.260

贊曰：下明眾觀暫變，彼心念為平等，故見坐花，見土亦淨。未久心淨，故令暫見。久者必由行成，近者佛令可得。

Commentary: Below explains that the assembly witnessed a temporary transformation: because their thoughts became impartial, they saw [the Buddha] seated upon the flower and saw the land to be pure as well. Since their minds had not been pure for long, they were made to see it only temporarily. For it to endure, it must come through the perfection of practice; for the immediate moment, the Buddha enabled it to be attained.