Vertical thinking is selection by exclusion. One works within a frame of reference and throws out what is not relevant. With lateral thinking one realizes that a pattern cannot be restructured from within itself but only as the result of some outside influence.

— Edward de Bono Lateral Thinking : Creativity Step by Step (1970)

More quotes by Edward de Bono

Lateral Thinking : Creativity Step by Step (1970)

Lateral Thinking : Creativity Step by Step (1970)

Lateral Thinking : Creativity Step by Step (1970)

Lateral Thinking : Creativity Step by Step (1970)

Lateral Thinking : Creativity Step by Step (1970)

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