Srila Prabhupada once said that sound creates the universe ( San Francisco temple lecture, 1967). Syamasundara prabhu asked how this happens, as he didn’t understand. In the blink of an eyelid Srila Prabhupada brought his palms together violently, making a loud clap. Immediately and sternly he replied, “Now do you understand?” Syamasundara just looked at him and nodded his head.