" Śrīla Prabhupāda: Spiritual pleasures come when you desire to please Kṛṣṇa. That is spiritual pleasure. For example, a mother is more pleased by feeding her son. She’s not eating, but when she sees that her son is eating very nicely, then she becomes pleased. Bob: Hmm. Spiritual pleasure, then, is pleasing God. Śrīla Prabhupāda: Spiritual pleasure means the pleasure of Kṛṣṇa. "

― A.C. Bhaktivedanta Swami Prabhupāda , Perfect Questions Perfect Answers: The Power of Mantra Meditation