In plain words
“Cittasya śuddhaye karmaḥ”: the karma we do must bring about purity of the citta. In man today boundless desires go beyond all limits. He reads things he does not put into practice. He looks at every sight that he cannot put into practice. He speaks words that he does not put into practice. What use is it? Only when he reads, sees and experiences even one thing that he puts into practice does he find fulfilment.
Spreading the many kinds of brahmavidyā, there are very many who preach; but there is not one great one who practises (even one).
There are very many who preach. But not one great one is to be seen who puts it into practice. That is why the country falls into such unrest. See that the feelings you think, the words you speak and the work you do come together as one.
Ridding oneself of bad feelings is true sādhana
To think what you have seen, to say what you have thought, to do what you have said. This is what they called samyak karma. What does karma mean? The work you do. What work should you do? When you think what you have seen and say what you have thought, you must do the karma that belongs to the oneness of the three. By doing karmas against these three he becomes still more impure. This samyak karma is samyak sādhana, said the Buddha. That is true sādhana; doing dhyāna, doing japa, doing pūjās: none of these are sādhanas. All these are good karmas, but what is true sādhana? To think what you have seen, to say what you have thought, to do what you have said, he said. This is the principle of the five senses. Samyak dṛṣṭi, samyak bhāvam, samyak vāk, samyak karma, samyak śravaṇam. Their coming together is samyak jīvanam, good living; if you want to gain it, think good. Do good work. In this sādhana there is one main thing man must recognise.