Swami Vivekananda stressed on the positive attitudes of life- love, harmony, service and the like. Some of these concepts find echo in an emerging trend of psychological studies called Positive Psychology. In fact, most of these traits are considered as marks of spiritual wisdom.
The animal has its happiness in the senses, the human beings in their intellect, and the gods in spiritual contemplation. It is only to the soul that has attained to this contemplative state that the world really becomes beautiful.
-Swami Vivekananda