The wave rises on the ocean, and there is a hollow. Again another wave rises, perhaps bigger than the former, to fall down again, similarly, again to rise — driving onward. In the march of events, we notice the rise and fall, and we generally look towards the rise, forgetting the fall. But both are necessary, and both are great. This is the nature of the universe. Whether in the world of our thoughts, the world of our relations in society, or in our spiritual affairs, the same movement of succession, of rises and falls, is going on. Hence great predominances in the march of events, the liberal ideals, are marshalled ahead, to sink down, to digest, as it were, to ruminate over the past — to adjust, to conserve, to gather strength once more for a rise and a bigger rise.
- Swami Vivekananda
The Complete Works of Swami Vivekananda/Volume 4/Lectures and Discourses/Christ, the Messenger