p.13 We may be dealing here with a general principle of action: Creativity always comes as a surprise to us; therefore we can never count on it and we dare not believe in it until it has happened. In other words, we would not consciously engage upon tasks whose success clearly requires that creativity be forthcoming. Hence, the only way in which we can bring our creative resources fully into play is by misjudging the nature of the task, by presenting it to ourselves as more routine, simple, undemanding of genuine creativity than it will turn out to be.
 Or, put differently: since we necessarily underestimate our creativity, it is desirable that we underestimate to a roughly similar extent the difficulties of the tasks we face so as to be tricked by these two offsetting underestimates into undertaking tasks that we can, but otherwise would not dare, tackle. The principle is important enough to deserve a name: since we are apparently on the trail here of some sort of invisible or hidden hand that beneficially hides difficulties from us, I propose the Hiding Hand.

p.14 Up to a point, the Hiding Hand can help accelerate the rate at which "mankind" engages successfully in problem-solving: it takes up problems it thinks it can solve, finds they are really more difficult than expected, but then, being stuck with them, attacks willy-nilly the unsuspected difficulties - and sometimes even succeeds.