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 varieties of religious belief are an advantage, since all faiths are good, so far as they encourage us to lead a religious life. The more sects there are, the more opportunities there are for making a successful appeal to the divine instinct in all of us.
-Swami Vivekananda