Santa-rati is described in the Bhakti-rasamrta-sindhu as follows...

Expressions researched:
"Santa-rati is described in the Bhakti-rasamrta-sindhu (2.5.16–18) as follows"

CC Madhya-lila

CC Madhya 19.183-184, Purport:

Śānta-rati is described in the Bhakti-rasāmṛta-sindhu (2.5.16–18) as follows:

mānase nirvikalpatvaṁ

śama ity abhidhīyate

"When one is completely free from all doubts and material attachments, he attains the neutral position, called śānta."

vihāya viṣayonmukhyaṁ nijānanda-sthitir yataḥ

ātmanaḥ kathyate so ’tra svabhāvaḥ śama ity asau

prāyaḥ śama-pradhānānāṁ mamatā-gandha-varjitā

paramātmatayā kṛṣṇe jātā śāntī ratir matā

The śānta-rati realization of Kṛṣṇa is in the neutral stage between the conception of impersonalism and personalism. This means that one is not very strongly attached to the personal feature of the Lord. An appreciation of the greatness of the Lord is called śānta-rati. This is attachment not to the personal feature but to the impersonal feature. Generally, one in this stage is attached to the Paramātmā feature of the Supreme Personality of Godhead.

īśvaraḥ sarva-bhūtānāṁ hṛd-deśe ’rjuna tiṣṭhati

bhrāmayan sarva-bhūtāni yantrārūḍhāni māyayā

“The Supreme Lord is situated in everyone's heart, O Arjuna, and is directing the wanderings of all living entities, who are seated as on a machine made of the material energy.” (BG 18.61) On the strength of this statement from the Bhagavad-gītā, we can understand that in śānta-rasa a devotee sees the Lord's representation everywhere.