tiṅho ye kahaye vastu, sei 'tattva'-sāra"
śrī-kṛṣṇa-caitanya-vāṇī—the message of Lord Śrī Caitanya Mahāprabhu; amṛtera dhāra—a continuous shower of nectar; tiṅho—the Lord; ye kahaye vastu—whatever He says to be the ultimate truth, the summum bonum; sei tattva sāra—that is the essence of all spiritual knowledge.
"The words of Śrī Caitanya Mahāprabhu are a shower of nectar. Whatever He concludes to be the ultimate truth is indeed the summum bonum of all spiritual knowledge."
Link to this page: https://prabhupadabooks.com/cc/madhya/25/58