Delta waves are produced in deep sleep. "The universe broadcasts at 7.5 Hz, just at the border between Alpha and Theta waves. Through meditation people can maintain their brainwaves on the same frequency as the universe. In theory, they can thus make themselves receptive to the power of the universe."
「宇宙的波動是七．五赫茲，剛好位於 α 波與 θ 波中間，人類可以靠冥想把自己的腦波維持在七．五赫茲，這時和宇宙的波動同頻，理論上，就能夠接受到宇宙的動力能量。」