Pouncing on an idea as soon as it appears kills the idea. Too early and too enthusiastic logical attention either freezes the idea or forces it into the old moulds. Concentration on an idea isolates it from its surroundings and arrests its growth. The glare of attention inhibits the fertile semi-conscious processes that go to develop an idea.
New Think: The Use of Lateral Thinking in the Generation of New Ideas, (p. 138), Avon Books. 1971