觀無量壽佛經疏 3.10

3.10

三、從當起想念下，至狀如懸鼓已來，正教觀察。此明正身威儀面向西方，守境住心堅執不移，所期皆應。

Three, from 'You should give rise to the visualization' down to 'like a suspended drum', directly teaches contemplation. This explains that, maintaining proper physical deportment and facing west, keeping to the object and steadying the mind firmly without shifting, all that is anticipated will be fulfilled.