from the www.AshidaKim.com website of Zen Koans:
A student of Tendai, a philosophical school of Buddhism, came to the Zen abode of Gasan as a pupil. When he was departing a few years later, Gasan warned him: "Studying the truth speculatively is useful as a way of collecting preaching material. But remember that unless you meditate constantly your light of truth may go out."
