In plain words
Nor is it gained by reading. Only when he first purified the five senses God has given did he recognise the true resolve: “I am pure.” That is why he said “samyak bhāvam”. How can a man who cannot purify even the senses he uses in daily life ever establish the truth that is beyond the senses? Then he said “samyak vacanam”. That is, good feelings arise. Only when good feelings arise do good words come out. Do not talk as you please just because you have a tongue. What did God give the tongue for? He gave this tongue for speaking sacred words, for uttering what is true, for seeing sacred sights and repeating them. He did not give the tongue merely to eat tasty dishes. He did not give the tongue to speak words without savour. He did not give the tongue to speak words that hurt others. He did not give the tongue to speak untruth. He gave the tongue for true speech, for words that make others happy, for speaking divine feelings, for describing God the divine; but man today tries to read every book there is in the world. There is no greater ignorance than this. If you go on reading until you die, when will you put it into practice? Are you trying to put into practice what you believe? If you do not try, what use is reading so many books? All this is only a stunt. Such reading is very impure. The Buddha went on making experiments of this kind. He read many books. He went to see many great souls. He listened to many teachings. But his mind found no satisfaction. He decided that this was not true Jñāna. Only when the antaḥkaraṇa is satisfied, he said, is Jñāna complete. The root cause for the antaḥkaraṇa to gain complete satisfaction is practice, he said. So the Buddha held words to be of the utmost importance. The tongue was not given to talk as you please with whoever crosses your path.