"The reason why our sentient, percipient and thinking ego is met nowhere within our scientific world picture can easily be indicated in seven words: because it is itself that world picture."

"But the truth is that we are not living in a world of objects, but in a world of events."

"The scientist's world-picture is of course not the only possible one. It is not even a complete one. It is just one, an important one, but it is not the whole truth."

"The problem of the 'thing in itself' is not a problem that can be solved by science. It is a philosophical problem."

"The only possible way of avoiding paradoxes is to admit that the 'observer' is not something that stands outside the world, but is part of it."