It (love of Godhead) is called parama-purusartha (the supreme goal of life) or purusartha-siromani - the most exalted of all purusarthas

Expressions researched:
"It is called parama-puruṣārtha (the supreme goal of life) or puruṣārtha-śiromaṇi (the most exalted of all puruṣārthas)"

Sri Caitanya-caritamrta

CC Antya-lila

Puruṣārtha (“the goal of life”) generally refers to religion, economic development, satisfaction of the senses and, finally, liberation. However, above these four kinds of puruṣārthas, love of Godhead stands supreme. It is called parama-puruṣārtha (the supreme goal of life) or puruṣārtha-śiromaṇi (the most exalted of all puruṣārthas). Lord Kṛṣṇa is worshiped by regulative devotional service, but the highest perfection of devotional service is spontaneous love of Godhead.

CC Antya 7.24, Translation and Purport

“Through the mercy of Rāmānanda Rāya, I have understood that ecstatic love of Kṛṣṇa is the highest goal of life and that spontaneous love of Kṛṣṇa is the highest perfection.

Puruṣārtha (“the goal of life”) generally refers to religion, economic development, satisfaction of the senses and, finally, liberation. However, above these four kinds of puruṣārthas, love of Godhead stands supreme. It is called parama-puruṣārtha (the supreme goal of life) or puruṣārtha-śiromaṇi (the most exalted of all puruṣārthas). Lord Kṛṣṇa is worshiped by regulative devotional service, but the highest perfection of devotional service is spontaneous love of Godhead.