“Lateral thinking is closely related to insight, creativity and humour.”

Source: Lateral Thinking : Creativity Step by Step (1970), p. 5; Preface

Source: Lateral Thinking : Creativity Step by Step (1970), p. 159.
Context: The concept of lateral thinking is insight restructuring and this is brought about through the rearrangement of information. Rearrangement is the basis of lateral thinking and rearrangement means escape from the rigid patterns established by experience. The rearrangement process is incorporated in the concept of the (re) laxative. The laxative is a rearranging device. It is the means whereby one can escape from established patterns and create new ones. The laxative allows the arrangement of information in new ways from which new patterns can arise. The concept of the laxative is crystallized into a definite language tool. This language tool is PO. Once one learns the function and use of PO one has learned how to use lateral thinking. The whole concept of lateral thinking is concentrated in the use of this language tool. Lateral thinking could be said to be the management of PO just as logical thinking is the management of NO.

Source: Linchpin: Are You Indispensable?

The Way to Love (1995)
Context: It is the desire for "the more" that prevents clear thinking, whereas if we are discontent, not because we want something, but without knowing what we want; if we are dissatisfied with our jobs, with making money, with seeking position and power, with tradition, with what we have and with what we might have; if we are dissatisfied, not with anything in particular but with everything, then I think we shall find that our discontent brings clarity. When we don't accept or follow, but question, investigate, penetrate, there is an insight out of which comes creativity, joy.

Anti-Dühring, pt. 1, ch. 11 (1878)

Source: Hearts in Atlantis

"Barack Obama signs order to close Guantánamo Bay prison camp", The Telegraph (22 January 2009) http://www.telegraph.co.uk/news/worldnews/barackobama/4316784/Barack-Obama-signs-order-to-close-Guantnamo-Bay-prison-camp.html
2009

The Age of Insight (2012)
Context: The remarkable insight that characterized Klimt's later work was contemporaneous with Freud's psychological studies and presaged the inward turn that would pervade all fields of inquiry in Vienna in 1900. This period... was characterized by the attempt to make a sharp break with the past and to explore new forms of expression in art, architecture, psychology, literature, and music. It spawned an ongoing pursuit to link these disciplines.