He leaned forward and gripped my arm. He was shivering horribly. "No words in our language can describe them!" He spoke in a hoarse whisper. "They are symbolized vaguely in the myth of the Fall, and in an obscene form which is occasionally found engraved on ancient tablets. The Greeks had a name for them, which veiled their essential foulness. The tree, the snake and the apple—these are the vague symbols of a most awful mystery.