Nature is trying all around to suppress us, and the soul wants to express itself. The struggle with nature is going on. Many things will be crushed and broken in this struggle for freedom. That is your real misery. Large masses of dust and dirt must be raised on the battlefield. Nature says, "I will conquer." The soul says, "I must be the conqueror." Nature says, "Wait! I will give you a little enjoyment to keep you quiet." The soul enjoys a little, becomes deluded a moment, but the next moment it [cries for freedom again]. Have you marked the eternal cry going on through the ages in every breast? We are deceived by poverty. We become wealthy and are deceived with wealth. We are ignorant. We read and learn and are deceived with knowledge. No man is ever satisfied. That is the cause of misery, but it is also the cause of all blessing. That is the sure sign. How can you be satisfied with this world? . . . If tomorrow this world becomes heaven, we will say, "Take this away. Give us something else."
- 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)