Self is the source of all courage and self is the source of all weakness. Self is the source of all joy and self is the source of all sorrows. That very self can make this world a beautiful place and that very self can also make this world a miserable place. The only thing that distinguishes the one from the other, is your intention.
What I want you to understand is that the words that our schools, our government, our media, our colleagues, and our family use have a profound effect on how you think and feel about life. The words that you learn, and then use to speak and think with, are molding your reality. Your vernacular creates your visual representation of the world, and the language you think with essentially creates your experienced reality.
The unification or “yog” of all humans in the psyche of the humans, that rises through simple human action or karma, with pure nonconflicted devotion or bhakti to the action and the self, while learning through healthy, effort-less effort or hatha and knowledge or gyana, is the king of all yoga, that is, raja yoga. This unification among humans is the real samadhi or nirvana in the civilized society of thinking humanity, for it brings true oneness with your fellow beings which leads to a real, actual, genuine paradise on earth, without the need for theorizing and philosophizing.