Human life's highest purpose is God realization, not merely satisfying bodily needs like hogs.Listen — Srila Prabhupada Uvaca
Śrīmad-Bhāgavatam 6.1.1-2 — May 22, 1975, Melbourne 750522SB-MELBOURNE [63:32 Minutes] SB-06.01.01-02_750522SB-MELBOURNE Prabhupāda: ...mo bhagavate vāsudevāya. Oṁ namo bhagavate vāsudevāya. [devotees chant responsively]. So, nivṛtti-mārgaḥ kathita ādau bhagavatā yathā krama-yogopalabdhena brahmaṇā yad asaṁsṛtiḥ pravṛtti-lakṣaṇaś caiva traiguṇya-viṣayo mune yo 'sāv alīna-prakṛte rguṇa-sargaḥ punaḥ punaḥ [SB 6.1.1-2] So we were discussing last night about nivṛtti-mārga, the opposite direction of progressing towards hellish condition of life, that by nature's own way the living entity comes to the human form of body by the evolutionary process.
That we have already discussed. There are 900,000's forms in the water. Then there are two millions forms of trees, plants. And jalajā nava-lakṣāni sthāvarā lakṣa-viṁśati [Padma Purāṇa].
Then insects, moths and flies, like that, they are 1,100,000 forms. Then birds, one millions forms. Then beast, three million forms. And then human being, civilized or not civilized, there are 400,000.
This is the total number of different forms of life. The living entity, spirit soul, is the same, but they are passing through different forms of life. Just like I am the same man. I have passed through my babyhood body, my childhood body, my youthhood body.
Now I have come to another body. So it is a fact that I was staying in a baby's body. Now it is another body. A very simple thing, that we are changing body, but I am, the soul, the same.
We have to understand this thing. The evolution is going on. Now, by nature's law the evolution brings you to a nice body, civilized human body, with higher consciousness. But if we utilize this higher consciousness simply for constructing very high skyscraper buildings and do not know what form of body I am going to accept next, that is not very good intelligence. My business is that by nature's evolutionary process I have come to this human form of life.
Now I have got good intelligence, better than the animals. If I utilize that intelligence for simply having nice motorcar and skyscraper building, but I do not know what is my future, then it is not very good intelligence. You can construct a very nice skyscraper building, and you can have a nice car, but you will not be allowed to stay here. What you have done for that?