Śrī Caitanya-caritāmṛta - Madhya-līlā 19.149

"“Because a devotee of Lord Kṛṣṇa is desireless, he is peaceful. Fruitive workers desire material enjoyment, jñānīs desire liberation, and yogīs desire material opulence; therefore they are all lusty and cannot be peaceful."

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Śrī caitanya-caritāmṛta Madhya 19.149