Introduction to Vedas
The entire Universe is reverberating. When there is reverberation, there is sound. In other words, the entire cosmos is simply a manifestation of sound energy. The ancient Vedic sages through penance, activated non-mechanical parts of their brains which enabled them to download cosmic data directly. They received cosmic truths in the form of sounds that they envisioned. These truths were recited as received and passed on generation after generation.
