"Silence is the language of the unspeakable."

The Moving Finger writes; and, having writ, Moves on: nor all thy Piety nor Wit Shall lure it back to cancel half a Line, Nor all thy Tears wash out a Word of it.

——1905年8月13日在东京中国留学生欢迎大会上的演说

Every mental state exists for a purpose; to understand it, we must ask what function it serves in the broader system of behavior.