So if we simply decide that "I shall do nothing except to serve Kṛṣṇa," this dṛḍha-vrata... If you want to take vow, take this vow. Then you haven't got to work very hard. So āpavarga. A means not, negative, and pavarga means five principles of material condition. First thing is pa—you have to work very hard, pariśrama. And then pha. Pha means you have to work so hard that foam will come through your mouth. You have seen sometimes in horse, in man, after hard working there is foam. So pa, pha, and ba. Ba means vyarthata. Vyarthata means disappointment in spite of working so hard so that foam is coming in the mouth, vyarthata. Just like you see, you have seen, horse or bulls. They are working so hard, and the master beating with whips, and still, the master is not satisfied and the animal cannot get sufficient food-vyarthata. In spite of so much working hard... We can see in the animal—sometimes we see in human society also—disappointment. After working so hard, disappointment. That is the nature of this material world. You think that by simply working hard you will be very happy. That is not possible. You can simply work hard—you will get whatever you are destined to get, either you work hard or not hard. It doesn't matter. Tasyaiva hetoḥ prayateta kovidaḥ. The material world, there are two things: one, something gain, and something lost. So gain or loss, so you will get it as you are destined. Every one of us, we are destined to certain extent of gain and certain extent of loss. That is destined.
So therefore śāstra says, "Don't try for this destined gain or loss. You are working so hard to making some gain. Even if you do not work hard, you will get that gain. Don't try for it. Better utilize the time for chanting Hare Kṛṣṇa." That is the injunction of śāstra. Tasyaiva hetoḥ prayeteta kovido na labhyate yad bhramatām upary adhaḥ (1.5.18). The people do not understand. They think that these young men are being induced to escape. No, it is not escape. This is the only path of liberation, āpavargya. To make the pavargas, pa, pha, ba, ba is vyartha, and bha... Bha means bhaya, fearfulness. In spite of working so hard, everyone is afraid: "What will happen next? What will happen next?" Āhāra-nidrā-bhaya-maithuna. This is the nature. And then, after working so hard, bringing out foam in the mouth, disappointment, then fearfuless—at last die, mrtyu, ma. Pa pha ba bha ma, these five, pavarga. In Sanskrit grammar there are vargas: ka-varga, ca-varga, ta-varga, like that, five vargas, the pa-varga.