Śrī Caitanya-caritāmṛta - Ādi-līlā 3.90-91

"Those whose nature is demoniac cannot know Kṛṣṇa at any time, but He cannot hide Himself from His pure devotees."

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"“There are two classes of men in the created world. One consists of the demoniac and the other of the godly. The devotees of Lord Viṣṇu are the godly, whereas those who are just the opposite are called demons.”"

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Śrī caitanya-caritāmṛta Ādi 3.90 & 3.91