It may be in the future the spaceships are perfect and you can go to the moon planet. But even if you go to the moon planet, that is not your highest perfection, because within this material world, if you go to any planet, moon or the highest planet, Brahmaloka . . . Moon planet is very near to us. It is only few hundreds thousands miles away. But there are many planets very, very high.
The Brahmaloka, they are also described. Even in the Bhagavad-gītā From the highest planet in the material world down to the lowest, all are places of misery wherein repeated birth and death take place. But one who attains to My abode, O son of Kuntī, never takes birth again.there is description. So ā-brahma-bhuvanāl lokāḥ punar āvartino 'rjuna (BG 8.16).
Similarly, if you have got so much restriction in, in a ordinary state that people from other parts of the world may come but they can stay here for six months or one year, or as limited by the visa, then go back, similarly, anywhere you go within this material world, you have to come back. Ā-brahma-bhuvanāl lokāḥ punar āvartino 'rjuna. You have to come back.
And besides that, any planet you go within this material world, the four principles of material sufferings are there. What are those? Janma-mṛtyu-jarā-vyādhi (BG 13.9): birth, death, old age and disease.
Everywhere there is. Your period of life may be very long, but these four things are there. You have to take your birth. Suppose you prepare yourself for going to the moon planet. Then next life, after leaving this body, you'll be pushed into the womb of a mother there in the moon planet, and you'll come out with a suitable body.
So the birth is there, and wherever there is birth and death, there is disease and old age. But I am, as spirit soul, I am free from . . . Asaṅgo 'yaṁ puruṣaḥ. I have nothing to do with birth, death and disease and old age. I am spirit soul. Na jāyate na mriyate na hanyate hanyamāne śarīre (BG 2.20). Nityaḥ śāśvato 'yaṁ purāṇaḥ. It is always, although it is the oldest, it is always fresh. Just like I have become. Now, amongst you, I am the oldest man. You are fresh. But the propensities of you and when the . . . of me, it is the same. I want to enjoy life. The same propensities which I had in my youthful life, I've got still. But because my body has become old, I cannot enjoy like that. So it is the bodily impediments that is hampering my real happiness.