The infinite human soul can never be satisfied but by the Infinite itself .... Infinite desire can only be satisfied by infinite knowledge — nothing short of that. Worlds will come and go. What of that? The soul lives and for ever expands. Worlds must come into the soul. Worlds must disappear in the soul like drops in the ocean. And this world to become the goal of the soul! If we have common sense, we cannot he satisfied, though this has been the theme of the poets in all the ages, always telling us to be satisfied. And nobody has been satisfied yet! Millions of prophets have told us, "Be satisfied with your lot"; poets sing. We have told ourselves to be quiet and satisfied, yet we are not. It is the design of the Eternal that there is nothing in this world to satisfy my soul, nothing in the heavens above, and nothing beneath.
- Swami Vivekananda
The Complete Works of Swami Vivekananda/Volume 4/Lectures and Discourses/The Practice of Religion
(Delivered at Alameda, California, on April 18, 1900)