Sri Ramakrishna (to Keshab): "You don't look into people's natures before you make them your disciples, and so they break away from you.
"All men look alike, to be sure, but they have different natures. Some have an excess of sattva, others an excess of rajas, and still others an excess of tamas. You must have noticed that the cakes known as puli all look alike. But their contents are very different. Some contain condensed milk, some coconut kernel, and others mere boiled kalai pulse. (All laugh.)
"Do you know my attitude? As for myself, I eat, drink, and live happily. The rest the Divine Mother knows. Indeed, there are three words that prick my flesh: 'guru', 'master', and 'father'.
"There is only one Guru, and that is Satchidananda. He alone is the Teacher. My attitude toward God is that of a child toward its mother. One can get human gurus by the million. All want to be teachers. But who cares to be a disciple?
"It is extremely difficult to teach others. A man can teach only if God reveals Himself to him and gives the command. Narada, Sukadeva, and sages like them had such a command from God, and Sankara had it too. Unless you have a command from God, who will listen to your words?
"Don't you know how easily the people of Calcutta get excited? The milk in the kettle puffs up and boils as long as the fire burns underneath. Take away the fuel and all becomes quiet. The people of Calcutta love sensations. You may see them digging a well at a certain place. They say they want water. But if they strike a stone they give up that place; they begin at another place. And there, perchance, they find sand; they give up the second place too. Next they begin at a third. And so it goes. But it won't do if a man only imagines that he has God's command.
"God does reveal Himself to man and speak. Only then may one receive His command. How forceful are the words of such a teacher! They can move mountains. But mere lectures? People will listen to them for a few days and then forget them. They will never act upon mere words.
"At Kamarpukur there is a small lake called the Haldarpukur. Certain people used to befoul its banks every day. Others who came there in the morning to bathe would abuse the offenders loudly. But next morning they would find the same thing. The nuisance didn't stop. (All laugh.) The villagers finally informed the authorities about it. A Government officer was sent, who put up a notice on the bank which read: 'Those who befoul this lake will be fined heavy penalty'. This stopped the miscreants at once. (All laugh.)
"To teach others, one must have a badge of authority; otherwise teaching becomes a mockery. A man who is himself ignorant starts out to teach others - like the blind leading the blind! Instead of doing good, such , teaching does harm. After the realization of God one obtains an inner vision. Only then can one diagnose a person's spiritual malady and give instruction.
"Without the commission from God, a man becomes vain. He says to himself, 'I am teaching people.' This vanity comes from ignorance, for only an ignorant person feels that he is the doer. A man verily becomes liberated in life if he feels: 'God is the Doer. He alone is doing everything. I am doing nothing.' Man's sufferings and worries spring only from his persistent thought that he is the doer.
"You people speak of doing good to the world. Is the world such a small thing? And who are you, pray, to do good to the world? First realize God, see Him by means of spiritual discipline. If He imparts power, then you can do good to others; otherwise not."
Source: Gospel of Sri Ramakrishna