When you say, "Don't think about it," it becomes impossible to think of anything else.
Chuang Tzu tells of a master cook whose knife remained sharp for years because when he carved an ox, he did not cut arbitrarily but respected the natural subdivisions of the animal's bones and muscles.
This legend is said to have taught the Chinese prince how to proceed successfully in life.
Rudolf Arnheim
When you say, "Don't think about it," it becomes impossible to think of anything else.