> In fact, if you observe your thinking, you might notice that your thought process often takes on different roles and personas.
I don't think it's possible to actually observe one's own thinking. A lot of the "eureka" moments one has in the shower, for example, were probably being thought about somewhere in your head but that process is completely hidden from your conscious mind.
Maybe not observe directly, but analyzing and understanding the thinking process is exactly what psychoanalysis is doing actually. But it takes the help of another person to be able to reach those unconscious thoughts.
I don't think it's possible to actually observe one's own thinking. A lot of the "eureka" moments one has in the shower, for example, were probably being thought about somewhere in your head but that process is completely hidden from your conscious mind.