觀無量壽佛經疏 3.125

3.125

七、從但當憶想已下，正明莊嚴微妙，出過凡境。雖未證目前，但當憶想令心眼見也。

Seventh, from "One should only mentally visualize" downward, it properly explains that the adornments are subtle and wondrous, surpassing the realm of ordinary beings. Although not yet verified before one's eyes, one should simply mentally visualize them to cause the mind's eye to see.