Interpretation and Philosophical Foundation of Quantum Mechanics

The situation is quite different in the case of quantum theory [as opposed to the theory of relativity], where we do not have such a generally accepted principle which can serve as the foundation of the theory. Indeed, I would suggest that this is the very reason makes it possible that a variety of different interpretations - in the broader sense - coexist. It is important to notice that nearly all of these interpretations are in agreement with each other when it comes to definite experimental predictions. Therefore, as is to be expected for an interpretation in the broader sense, there is no way - at least not immediately - of experimentally differentiating between them.[my emphasis]

I love the logic of this paragraph. And something else:

In an application of Bohr's statement which says that a quantum phenomenon comprises both the quantum system and the measuring device, Wheeler states that we as observers are free to decide in which way we will bring a quantum phenomenon to its close. We decide, by choosing the measuring device, which phenomenon can become reality and which one cannot. Wheeler explicates this by example of the well-known case of a quasar, of which we can see two pictures through the gravity lens action of a galaxy that lies between the quasar and ourselves. By choosing which instrument to use for observing the light coming from that quasar, we can decide here and now whether the quantum phenomenon in which the photons take part is interference of amplitudes passing on both sides of the galaxy or whether we determine the path the photon took on one or the other side of the galaxy. In both cases the individual process again contains an element that cannot be controlled. For example if we decide to measure the path of the photon - to let the path become reality - we have no influence on which of the two possible paths of the photon actually will be observed.

This is the reason why Wheeler labels the individual quantum phenomenon an elementary act of creation. We as observers play a significant role in this process since we can decide by choosing the measuring device which quantum phenomenon is realized. Still, we cannot influence the specific value obtained through the measurement. Finally, since we are part of the universe, the universe, according to Wheeler, creates itself by observing itself through us.

By observing we influence fundamentally...I recently read a science fiction story by Adam Roberts, called Stone, where he proposes that, because of that influence that a consciousness has on a quantum level, that there exists only one type of consciousness per universe. Of course that's just my interpretation and memory of the story. Will have to reread it. I can certainly recommend the novel...

From the same page:

A very interesting and closely related position is taken by Just[24] from a psychoanalytic viewpoint. He compares the spontaneous and discontinuous reduction of the wave function in the quantum mechanical measuring process with the process of spontaneous realization ("Aha-Erlebnis"), to which in his opinion exactly the same characteristics apply.

I can't say I'm hundred percent sure I understand this (the original is a lecture in German, ja?), but it seems to be the sort of thing that happened when Archimedes ran naked through the streets shouting Eureka!. Eureka-Erlebnis possibly? The sort of feeling you get when you suddenly understand a difficult concept. Something I'm obviously not going to experience soon in my readings of quantum physics.