Acharya Prashant explains that the purpose of one's life must be something that is not only high and attractive but also continuously increasing in its height and beauty. He uses the analogy of a building where the view becomes more enchanting as one climbs higher, compelling one to ascend further. This journey is infinite because the closer one gets to the goal, the more one realizes its vastness and value. He asserts that a true life goal should be unachievable, like the horizon, because anything that can be fully attained is smaller than the seeker. The joy lies in the continuous effort and the process of knowing, rather than in a final result or destination, which is often subject to worldly coincidences and circumstances.