CC Madhya-lila 24.170 - Brhan-naradiya Purana
Sri Caitanya-caritamrta
CC Madhya-lila
CC Madhya 24.170, Translation and Purport:
“"Those who are eager to awaken their spiritual consciousness and who thus have unflinching, undeviated intelligence certainly attain the desired goal of life very soon."
This is a quotation from the Nāradīya Purāṇa.