Most often, those who work very hard day and night to clear the burden of self-created duties say that they have no time to hear of the immortality of the living being. To such mudhas, material gains, which are destructible, are life’s all in all — despite the fact that the mudhas enjoy only a very small fraction of the fruit of labor. Sometimes they spend sleepless days and nights for fruitive gain, and although they may have ulcers or indigestion, they are satisfied with practically no food; they are simply absorbed in working hard day and night for the benefit of illusory masters. Ignorant of their real master, the foolish workers waste their valuable time serving mammon. Unfortunately, they never surrender to the supreme master of all masters, nor do they take time to hear of Him from the proper sources. The swine who eat the night soil do not care to accept sweetmeats made of sugar and ghee. Similarly, the foolish worker will untiringly continue to hear of the sense-enjoyable tidings of the flickering mundane world, but will have very little time to hear about the eternal living force that moves the material world.
The mudhas are those who are grossly foolish, like hardworking beasts of burden. They want to enjoy the fruits of their labor by themselves, and so do not want to part with them for the Supreme. The typical example of the beast of burden is the ass. This humble beast is made to work very hard by his master. The ass does not really know for whom he works so hard day and night. He remains satisfied by filling his stomach with a bundle of grass, sleeping for a while under fear of being beaten by his master, and satisfying his sex appetite at the risk of being repeatedly kicked by the opposite party. The ass sings poetry and philosophy sometimes, but this braying sound only disturbs others. This is the position of the foolish fruitive worker who does not know for whom he should work. He does not know that karma (action) is meant for yajna (sacrifice).