A sceptic who mocked transcendence is told to 'behold'—what could force a materialist to keep such a secret?

“It is well,” replied my visitor. “Lanyon, you remember your vows: what follows is under the seal of our profession. And now, you who have so long been bound to the most narrow and material views, you who have denied the virtue of transcendental medicine, you who have derided your superiors—behold!”