Some slokas from today’s lecture:

sandhyā-vandana bhadram astu bhavato bho snāna tubhyaṁ namo
bho devāḥ pitaraś cha tarpaṇa-vidhau nāhaṁ kṣamaḥ kṣamyatām
yatra kvāpi niṣadya yādava-kulottaṁsasya kaṁsa-dviṣaḥ
smāraṁ smāram aghaṁ harāmi tad alaṁ manye kim anyena me
(Śrī-Mādhavendra-Purīpādānāṁ)

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That is the way of the Vaiṣṇavas, and it is further illustrated by the statement of Lord Śiva:

ārādhanānāṁ sarveṣāṁ, viṣṇor ārādhanaṁ param

“Of all the varieties of worship, the worship of Viṣṇu is said to be the best.”

tasmāt parataraṁ devi, tadīyānāṁ samarcanam

“But the highest and complete concept of worship is to serve the one who is most dear to Viṣṇu.” Just worshipping Viṣṇu is not complete without the potency of the one who is most dear to Him. So if we look at this in another way, the highest possible sevā is the service of Śrīmatī Rādhārāṇī. It is higher than service to Viṣṇu or Kṛṣṇa.”
(from Dignity of the Divine Servitor)

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vikrīḍitaṁ vraja-vadhūbhir idañ cha viṣṇoḥ
śraddhānvito ’nuśṛṇuyād atha varṇayed yaḥ
bhaktiṁ parāṁ bhagavati pratilabhya kāmaṁ
hṛd-rogam āśv apahinoty achireṇa dhīraḥ
(SB 10.33.39)

nehābhikrama-nāśo ’sti pratyavāyo na vidyate
svalpam apy asya dharmasya trāyate mahato bhayāt
(Śrīmad Bhagavad-gītā: 2.40)