"What can you achieve by mere lecturing and scholarship without discrimination and dispassion? God alone is real, and all else is unreal. God alone is substance, and all else is nonentity. That is discrimination.
"First of all set up God in the shrine of your heart, and then deliver lectures as much as you like. How will the mere repetition of 'Brahma' profit you if you are not imbued with discrimination and dispassion? It is the empty sound of a conch-shell.
"There lived in a village a young man named Padmalochan. People used to call him 'Podo', for short. In this village there was a temple in a very dilapidated condition. It contained no image of God. Aswattha and other plants sprang up on the ruins of its walls. Bats lived inside, and the floor was covered with dust and the droppings of the bats. The people of the village had stopped visiting the temple. One day after dusk the villagers heard the sound of a conch-shell from the direction of the temple. They thought perhaps someone had installed an image in the shrine and was performing the evening worship. One of them softly opened the door and saw Padmalochan standing in a corner, blowing the conch. No image had been set up. The temple hadn't been swept or washed. And filth and dirt lay every where. Then he shouted to Podo:
You have set up no image here,
Within the shrine, O fool!
Blowing the conch, vou simply make
Confusion worse confounded.
Day and night eleven bats
Scream there incessantly. . . .
"There is no use in merely making a noise if you want to establish the Deity in the shrine of your heart, if you want to realize God. First of all purify the mind. In the pure heart God takes His seat. One cannot bring the holy image into the temple if the droppings of bats are all around. The eleven bats are our eleven organs: five of action, five of perception, and the mind.
"First of all invoke the Deity, and then give lectures to your heart's content. First of all dive deep. Plunge to the bottom and gather up the gems. Then you may do other things. But nobody wants to plunge. People are without spiritual discipline and prayer, without renunciation and dispassion. They learn a few words and immediately start to deliver lectures. It is difficult to teach others. Only if a man gets a command from God, after realizing Him, is he entitled to teach."
Source: Gospel of Sri Ramakrishna