In plain words
By the good deeds he has done, man gains a human body. But mala, vikṣepa and āvaraṇa come to cover man only through sinful deeds: adultery, theft, lying and base acts.
What mala means is a thing everyone knows. All the many kinds of food that each man eats turn, in their gross form, into mala. In their subtle form they turn into the mind. As long as this mala stays in a man, he has no ease, no comfort, no joy of any kind. If one does not void it, one can fall into great suffering. Many diseases too can arise. That is why those who are constipated have enemas given to them. In some way or other we must draw it out, by force if need be. In the same way, we must void the mala that has gripped the mind as well. What is this mala? That is, the fruit of the evil deeds we have done through many births. That is adultery, theft, Asatya, base acts. By the fruit of these evil deeds they lead man to a state in which he cannot know his own svarūpa. There is a little story about this.
Two friends, going to another village, were travelling through a dense forest. In that same forest, before them, a diamond merchant had bought some diamonds from a mahārāja for a price, and since there were no cars or buses in those days, was riding on horseback, wanting to reach his home very fast. With the speed of the horse, a bundle of diamonds slipped and fell in that forest. After that these two friends went that way. The two of them were going to some other village. What kind of men were these friends? Though their bodies were separate, they were as one life. Such a close Prema had they grown between them. Neither would stay apart from the other even for a moment. The two of them both saw this bundle. One friend untied the bundle. As he untied it, they saw diamonds shining with a great brilliance. These two friends: at once an evil feeling came over one friend. This is the reaction of mala. He spoke to the second friend. “Friend! Take this bundle and sit under a tree. We are getting hungry. I shall go to the town close by and bring back some curd rice and tamarind rice made up into packets. The two of us will eat, and by nightfall we shall reach the village at our ease,” he said. The second friend said, “Fine, brother.” Under a tree he was guarding the bundle safely. In the one who had gone to the town to bring the food, evil feelings and evil thoughts grew stronger, little by little, moment by moment. He went to a hotel. He took one packet of tamarind rice and one packet of curd rice. From there he went straight to a medical shop.