For an answer which cannot be expressed the question too cannot be expressed. The riddle does not exist.

Usually a person relates to another under the tacit assumption thatthe other shares his view of reality, that indeed there is only onereality.

This is the secret of propaganda: To totally saturate the person, whom the propaganda wants to lay hold of, with the ideas of the propaganda, without him even noticing that he is being saturated.

Man never ceases to seek knowledge about the objects of his experiences, to understand their meaning for his existence and to react to them according to his understanding. Finally, out of the sum total of the meanings that he has deduced from his contacts with numerous single objects of his environment there grows a unified view of the world into which he finds himself "thrown" (to use an existentialist term again) and this view is of the third order.

Our everyday, traditional ideas of reality are delusions which we spend substantial parts of our daily lives shoring up, even at the considerable risk of trying to force facts to fit our definition of reality instead of vice versa.

That we do not discover reality but rather invent it is quite shocking for many people. And the shocking part about it - according to the concept of radical constructivism - is that the only thing we can ever know about the real reality (if it even exists) is what it is not. It is only with the collapse of our constructions of reality that we first discover that the world is not the way we imagine.

A self-fulfilling prophecy is an assumption or prediction that, purely as a result of having been made, cause the expected or predicted event to occur and thus confirms its own 'accuracy.'