大毘盧遮那成佛經疏 3.51

3.51

偈云「花房高樓閣，勝妙諸池苑」者，若不得如上福地，不可便停，應擇取俗間勝處，若端嚴清淨便可作法。房是上古以來眾生，以慚愧故，不欲令襞慢彰著，亦可以庇衛其身自護護他。樓閣是西方重屋上高顯平露處。池謂清淨池沼，多有水生諸花，人與非人咸所愛樂。苑謂園林，多名香軟草芳木欝盛，蕭然幽靜可屏喧煩。皆又其亞也。復次若見行人，雖未入餘方便道中，然其體性具足慚愧，常能自護亦能護他，或其心明白易知少諸障礙，乃至犯罪亦能發露向人，求自清淨無所隱祕，亦可傳授也。又池是渴水無厭義，謂此人雖未得深法味，而能虛心聽受渴仰無厭。園是多人遊觀處，謂此人性多悲愍好行慈濟，咸所歸仰賴其蔭庇，此皆大乘種性，亦可匠成也。

The verse says:
'Flower pavilions and high multi-storied mansions,
And various excellent ponds and gardens':
If one cannot obtain such blessed grounds as described above, one must not simply stop; one should select superior places in the secular realm: if dignified and pure, one may perform the rites. 'Pavilion' refers to that which sentient beings since high antiquity, out of a sense of shame, built not wishing to expose their private faults, and which can also shelter their bodies to protect themselves and protect others. 'Multi-storied mansions' refers to the elevated, level, open spaces atop multi-storied buildings in the Western regions. 'Ponds' refers to clean ponds and marshes with many water-born flowers, delighted in by both humans and non-humans. 'Gardens' refers to parks and groves, lush with many renowned fragrances, soft grass, and fragrant trees, quiet and secluded, capable of shielding against noise and vexation. All of these are also secondary. Furthermore, if one sees a practitioner who, although not yet entered into other pathways of upāya, nonetheless possesses shame and conscience by nature, constantly able to protect themselves and also protect others, or whose mind is clear, easy to know, and has few obstacles, so that even when committing a fault they can confess it to others, seeking their own purity without concealing anything—such a person may also be transmitted [the teachings]. Moreover, 'pond' has the meaning of an insatiable thirst for water, meaning that although this person has not yet tasted the deep Dharma-flavour, they can listen and receive with an open mind, thirsting and yearning without satiation. 'Garden' is a place where many people wander and sightsee, meaning that this person is by nature very compassionate and fond of practicing benevolent aid, being someone to whom all turn and rely upon for shelter. All these belong to the Mahāyāna disposition, and may also be fashioned [into suitable vessels].