Within You Is The Whole Universe - Hindu Tantrism Teaching Most people imagine Tantrism as something external — rituals, mantras, symbols, secret practices. But the deeper truth that emerges from sustained study is startlingly simple: everything sacred that we search for outside already exists within us. The body is the temple. The heart is the altar. The digestive fire is the sacred flame. Awareness itself is the eternal light. And silence is the most powerful mantra of all. The Body As Temple In the Taittiriya Upanishad, the human being is described as made of five sheaths, or koshas — food, breath, mind, intellect, and bliss — layered like the chambers of a temple, with the innermost sanctum housing the Self. Just as a temple has walls, a courtyard, and finally a garbhagriha where the deity resides, the body has skin, muscle, and organs, all protecting the consciousness seated within the heart. A simple example: when we fall sick, we instinctively rest and nurse the body with th...