Pure devotion means wanting nothing but Krishna's happiness, abandoning all material attachment for spiritual truth.Listen — Srila Prabhupada Uvaca
Prabhupāda: kecit kevalayā bhaktyā vāsudeva-parāyaṇāḥ aghaṁ dhunvanti kārtsnyena nīhāram iva bhāskaraḥ [SB 6.1.15] This verse we have been discussing last week, that in spite of going through the process of austerities and other methods—controlling the senses, controlling the mind, by renunciation; so many formulas we have discussed to elevate oneself, they are required—if we do not try to elevate ourselves, if we try to keep ourselves with the animal propensities, then we remain like animal. Just like if you are admitted in some educational institution, the school, if you don't take advantage of the education, you remain yourself where you are admitted in the same point, then you don't take advantage of the institution, you remain a foolish, or illiterate or ignorant. Similarly, in this human form of life, if you do not take advantage of the knowledge left by the great sages or by the Supreme Personality of Godhead, Kṛṣṇa, then it is exactly like that you enter into educational life, you don't take advantage of it, and you become failed in the ultimate examination. Exactly like that. Human life is meant for being promoted to a higher stage of life, and the ultimate higher stage of life is to go back to home, back to Godhead.
You can do that. Even if you do not go back to home, back to Godhead, you can elevate yourself to the higher planetary system, where the standard of life is far better, thousand, thousand times better. Or if you are intelligent enough, then you don't care for any higher standard of life within this material world, but you finish this material existence and you enter into the kingdom of God and live eternally [with] Kṛṣṇa, or Viṣṇu. Either of these things you can do. That is stated in the Bhagavad-gītā.
Learn Bhagavad-gītā very careful; everything is there. The Lord says, yānti deva-vratā devān [Bg 9.25]. Those who want higher standard of life like the demigods, more beautiful body, long duration of life... According to demigods' calculation our six months is equal to one day of the demigods. Similarly the hundred years.
But their hundred years and our hundred years, different. Their hundred years means, just calculate, if their one day is our six months, then their 30 days means—six into 30: 180 months. Their one month means our 180 months. Similarly one year, and such 10,000's of years they live.
So a very long duration of life. This is in the Svargaloka. The moon planet is also one of the Svargalokas. So if you want, that if you think that "I am living here utmost hundred year. Oh, I shall get ten millions of years," that you can have.
Yānti deva-vratā devān[ Bg. 9.25]. You practice according to that, so that after leaving this body you are promoted to that higher planetary system. Not by this sputnik; this is not possible. You cannot enter. You have to qualify yourself.
Just like you have qualified yourself, at the present moment, from the insignificant aquatics, animal life, then fish life, plant life, this gradual process of evolution. You have come to this human standard of life. Similarly, you can elevate yourself to further, further higher standard of life. That is called yānti deva-vratā devān pitèn yānti pitṛ-vratāḥ [ Bg. 9.25]. Similarly, you can elevate yourself to the Pitṛloka, bhūtejyā yānti bhūtāni.