觀無量壽佛經義疏 3.35

3.35

「『若欲念彼佛者，當先作此華座想。』」不先華座則觀佛不成。三、教純一離雜觀。

"‘If one wishes to be mindful of that Buddha, one should first form this visualization of the flower throne.’" If one does not begin with the flower throne, the contemplation of the Buddha will not be accomplished. Third, instructing single-mindedness free from mixed contemplations.