Summary:  Upanishads, through various philosophical and scholarly lenses, offering translations, commentaries, and critical analyses. Works by scholars like Deussen, Weber, and Regnaud provide systematic expositions, historical context, and comparative studies of the Upanishads, shedding light on their profound philosophies. Text editions by Polet, Rammouun Roy, and others preserved and made accessible the ancient wisdom contained in the Upanishads to a wider audience. French translations by Deuxmelles and Mischel, as well as German translations by Arnold and others, brought the spiritual teachings of the Upanishads to a broader Western readership. These works serve as a bridge between the rich spiritual heritage of the Upanishads and contemporary philosophical thought, showcasing the enduring relevance and timeless wisdom of these ancient texts.