"A pure devotee is one whose intelligence is clear; he is truly thoughtful because he engages in the service of the Lord—not as a matter of show, but with love, with his mind, words and body. Nondevotees may make a show of religion, but it is not very effective because although they ostentatiously attend a temple or church, they are thinking of something else."
(Śrīmad-Bhāgavatam 6.3.26, Purport)
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