He should execute service externally as a regulative devotee as well as internally from his self-realized position. Thus he should perform devotional service both externally and internally

Expressions researched:
"He should execute service externally as a regulative devotee as well as internally from his self-realized position. Thus he should perform devotional service both externally and internally"

Sri Caitanya-caritamrta

CC Madhya-lila

The advanced devotee who is inclined to spontaneous loving service should follow the activities of a particular associate of Kṛṣṇa’s in Vṛndāvana. He should execute service externally as a regulative devotee as well as internally from his self-realized position. Thus he should perform devotional service both externally and internally.

CC Madhya 22.158, Translation and Purport

The advanced devotee who is inclined to spontaneous loving service should follow the activities of a particular associate of Kṛṣṇa’s in Vṛndāvana. He should execute service externally as a regulative devotee as well as internally from his self-realized position. Thus he should perform devotional service both externally and internally.

This verse is also found in the Bhakti-rasāmṛta-sindhu (1.2.295).