Note f110 — ON SATORI—THE REVELATION OF A NEW TRUTH IN ZEN BUDDHISM
Reading edition
The lightning simile in the Kena-Upanished (IV. 30), as is supposed by some scholars, is not to depict the feeling of inexpressive awe as regards the nature of Brahman, but it illustrates the bursting out of enlightenment upon consciousness. “A—a—ah” is most significant here.