Once a poor brāhmaṇa worshiped Lord Śiva for a benediction, and Lord Śiva advised the devotee to go to see Sanātana Gosvāmī. The devotee went to Sanātana Gosvāmī and informed him that Lord Śiva had advised him to seek out the best benediction from him (Sanātana). Sanātana had a touchstone with him, which he kept with the garbage. On the request of the poor brāhmaṇa, Sanātana Gosvāmī gave him the touchstone, and the brāhmaṇa was very happy to have it. He now could get as much gold as he desired simply by touching the touchstone to iron. But after he left Sanātana, he thought, “If a touchstone is the best benediction, why has Sanātana Gosvāmī kept it with the garbage?” He therefore returned and asked Sanātana Gosvāmī, “Sir, if this is the best benediction, why did you keep it with the garbage?” Sanātana Gosvāmī then informed him, “Actually, this is not the best benediction. But, are you prepared to take the best benediction from me?” The brāhmaṇa said, “Yes, sir. Lord Śiva has sent me to you for the best benediction.” Then Sanātana Gosvāmī asked him to throw the touchstone in the water nearby and then come back. The poor brāhmaṇa did so, and when he returned, Sanātana Gosvāmī initiated him with the Hare Kṛṣṇa mantra. Thus by the benediction of Lord Śiva the brāhmaṇa got the association of the best devotee of Lord Kṛṣṇa and was thus initiated in the mahā-mantra, Hare Kṛṣṇa, Hare Kṛṣṇa, Kṛṣṇa Kṛṣṇa, Hare Hare/ Hare Rāma, Hare Rāma, Rāma Rāma,Hare Hare.
Ref >> Srila Prabhupada Vani.