The Shvetashvatara Upanishad is found in the black Yajurveda. The text opens with metaphysical questions about the primal cause of all existence, its origin, its end, and what role if any did time, nature, necessity, chance, the spirit had as primal cause? It then develops its answer, concluding that "the Universal Soul exists in every individual, it expresses itself in every creature, everything in the world is a projection of it, and that there is Oneness, a unity of souls in one and only Self".