When the humour of a particular situation or scene, happening or idea strikes a person he may burst out into sudden laughter. It is not long-forming but explosive, not built-up like a wall brick-by-brick but flashed across the darkness like lightning. His mind has this possibility of an abrupt move, an unexpected leap. Just so does it still possess this same possibility with regard to the discovery of truth.
-- Notebooks Category 22: Inspiration and the Overself > Chapter 6: Experiencing a Glimpse > # 9