One should constantly engage in topics about that servitor and his loving relationship with Krsna, and one should live in Vrndavana. If one is physically unable to go to Vrndavana, he should mentally live there

Expressions researched:
"One should constantly engage in topics about that servitor and his loving relationship with Kṛṣṇa, and one should live in Vṛndāvana. If one is physically unable to go to Vṛndāvana, he should mentally live there"

Sri Caitanya-caritamrta

CC Madhya-lila

The devotee should always think of Kṛṣṇa within himself and should choose a very dear devotee who is a servitor of Kṛṣṇa in Vṛndāvana. One should constantly engage in topics about that servitor and his loving relationship with Kṛṣṇa, and one should live in Vṛndāvana. If one is physically unable to go to Vṛndāvana, he should mentally live there.

CC Madhya 22.160, Translation and Purport

The devotee should always think of Kṛṣṇa within himself and should choose a very dear devotee who is a servitor of Kṛṣṇa in Vṛndāvana. One should constantly engage in topics about that servitor and his loving relationship with Kṛṣṇa, and one should live in Vṛndāvana. If one is physically unable to go to Vṛndāvana, he should mentally live there.

This verse is also found in the Bhakti-rasāmṛta-sindhu (1.2.294).