Śrī Caitanya Caritamrta · Text Madhya 20.119
ভয়ং দ্বিতীয়াভিনিবেশতঃ স্যা-
দীশাদপেতস্য বিপর্যয়োঽস্মৃতিঃ ।
তন্মায়য়াতো বুধ আভজেত্তং
ভক্ত্যৈকয়েশং গুরুদেবতাত্মা ॥ ১১৯ ॥
bhayaṁ dvitīyābhiniveśataḥ syād
īśād apetasya viparyayo ’smṛtiḥ
tan-māyayāto budha ābhajet taṁ
bhaktyaikayeśaṁ guru-devatātmā
“ ‘When the living entity is attracted by the material energy, which is separate from Kṛṣṇa, he is overpowered by fear. Because he is separated from the Supreme Personality of Godhead by the material energy, his conception of life is reversed. In other words, instead of being the eternal servant of Kṛṣṇa, he becomes Kṛṣṇa’s competitor. This is called viparyayo’smṛtiḥ. To nullify this mistake, one who is actually learned and advanced worships the Supreme Personality of Godhead as his spiritual master, worshipful Deity and source of life. He thus worships the Lord by the process of unalloyed devotional service.’
Read Śrīla Prabhupāda's purport on Vedabase.io