In plain words
Nature itself is man's true life. Developing such conduct is itself … chief duty. Karma can determine and tell the good and the bad in every man. A mirror shows how the face of … is. Karma has the nature of deciding whether every karma a man performs is good or bad. A 'thermometer' … well the heat in a person. In the same way, the principle that decides whether a man is in the sāttvic guṇa, or in the rājasic guṇa, or in the … guṇa, is the principle of karma. So karma has the power to decide the … and bad in man. Karma itself is man's chief duty. So the Upaniṣads: '… namaḥ karmaṇe', a salutation to karma first of all. 'O karma! Make … sacred karmas with my hands': pray so. I am one who has taken on humanness. My duty is divine and sacred; it is not man's nature to perform all karmas like …. The beast is the one that is subject to Prakṛti. Man is the one who has the strength and capacity to make Prakṛti …. That is why 'jantūnāṃ narajanma durlabham' has been describing … birth as hard to attain. The karma the ajñānī does and the karma the jñānī does look alike to the outward eye, yet in inner knowing their aims are different. How is that? There is a … patient. A boil rose on his hand and came to a still more dangerous state. Fearing that this … dangerous state might spread through the whole body, the doctor cuts off the hand. On the other hand, because very valuable gold bangles are on … …, the thief cuts off that hand and … the bangles. The thief's cutting and the doctor's cutting are the same. But what the doctor did is a help; what … did is a harm. In the same way, the karmas the jñānī does … to onlookers, then, as merely worldly. The karmas the ajñānī does also appear as worldly karmas alone. But the … man who performs worldly karmas takes on a feeling of identity with them. He performs them with a view to gain. But the jñānī, free of self-interest, performs them with … feeling. So here purity of feeling and purity of knowledge, both, become one purity. In … everyone keeps performing karmas. But how the fruit of the karmas turns out, … nature makes clear.
So it is the direct witness to our feelings. To look at, someone is like a very sāttvic man, gentle and sweet; he ….