CC Antya 4.176
‘ei bhāla, ei manda’, — ei saba ‘bhrama’
“In the material world, conceptions of good and bad are all mental speculations. Therefore, saying ‘This is good’ and ‘This is bad’ is all a mistake.
Kṛṣṇa, the Supreme Personality of Godhead, is the Absolute Truth, ever existing with different varieties of energies. When one is absorbed in the illusory energy of Kṛṣṇa and cannot understand Kṛṣṇa, one cannot ascertain what is good for him and what is bad. Conceptions of good and bad are all imaginations or mental speculations. When one forgets that he is an eternal servant of Kṛṣṇa, he wants to enjoy the material world through different plans. At that time he distinguishes between material plans that are good and those that are bad. Actually, however, they are all false.