President Kennedy, he was a nice president, but he was killed. So here in this material world, or māyā, if you render service to māyā, illusion, you'll never be satisfied, neither the person to whom you are giving service, he'll be satisfied. There is no satisfaction, either to the so-called master or to the servant. Because Kṛṣṇa is missing. That's all. One should understand this.
This is the actually fact. Here the service is going on, but the master and the servant, both are not satisfied. But there is another platform, spiritual world, where service rendered, both the master and the servant become satisfied immediately. Tasmin tuṣṭe jagat tuṣṭaḥ.
The same example: Just like if (you) put your eatables into the stomach, so the stomach is satisfied and all the servants— the hands, legs, and others who acquire their foodstuff and put into the mouth—they are also satisfied, automatically. The hands, legs, fingers, eyes—every part of my body—immediately satisfied. Yathā prāṇopahārāc ca yathendriyāṇām (SB 4.31.14).
We are, at the present moment in the material existence, we are trying to be satisfied. That is also . . . the example is there: Just like a child is crying. You give him something eatable, he puts it in the mouth, and he's satisfied; no more crying. Similarly, actually if we want to be satisfied, then, as it is said here, saṁsthāṁ vijñāya sannyasya karma trai-vargikam. Give up this, saṁsthām, saṁsthāṁ vijñāya . . . saṁsthām means death. Death is sure. Death is the best surety as . . . "As sure as death." Nobody can say that, "I can avoid death." That's a fact.
So one who actually understands that, "I'll have to die . . ." People do not understand. Everyone thinks that he will not die. He'll not die. That is called māyā. He's seeing that everyone is dying; still, he's thinking that "I shall not die" or "I shall live for millions of years. There is no question of death." But it is a fact. You may be advanced in science, but he . . . this death is sure. That's a fact.
Therefore it is advised here that saṁsthāṁ vijñāya, one who is actually intelligent, he should know that he will die. But the karmīs, the rascals, he knows also that he will die—at least, theoretically accept—but he wants to enjoy, since the death does not come, to the fullest extent. That is the present condition of the society. He knows that he will die. "So, so long my senses are there, let me gratify."