I was recently reading a bit on Comets, and ultimately it led to Anaxagoras, an astronomer from Klazomenae, one of the main cities of the region of Ionia in the western coast of Asia Minor.
Anaxagoras later on moved to Athens, due to the failed Ionian revolt against Persia. At roughly 466 BC a comet was sighted above AigosPotamoi, a region in Thrace, along the Bosphorus. It is probable that the views of Anaxagoras in regards to the stars being vast fiery cores, were playing a role in the examination of that event, given that it appears a meteorite also fell at the time of the comet's perihelion, and made enough of an impression so as to be even mentioned by Aristotle an aeon later.
Anaxagoras was famous for largely two of his theories. The one was of the massive fiery cores above, being the stars. The other was his view that all objects consist of an infinite amount of tiny particles (the term 'atom' was given by him, and means 'indivisable').
While he later fled Athens due to the decline in popularity of Pericles, who was a student of his, he is widely regarded as crucial in the first stages of Greek astronomy, which later on (mostly during the Hellenistic era) would provide figures such as Eratosthenes, and in the early Roman Era of Alexandria, Ptolemy.
But the view of Anaxagoras i wanted to base this thread on was that the human mind was not just another object to be examined, but the one by which everything else is examined and itself is not subject to the same kind of analysis. At roughly the same time, another thinker, Protagoras, had claimed in one of his famous apophegms that "Man is the meter of all things". Anaxagoras not only claims this, but moreover that man is not really part of those things at all, because his mind is not one of them, but is a mechanism of examination of them.
Terminology is crucial, of course. Anaxagoras always used the term "nous" (νους

to refer to the driving force being the human mind. I assume he meant a core of consciousness, linked to will and the ability to deliberately think of something, cause the term even today refers to that, and not to the mind as a whole, or as a material organ.
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The introductory question of the thread is whether you agree with Anaxagoras that our core of consciousness is not of the same type as anything we can examine, and thus is not to be taken as one of those objects of examination. If it is of a very different form, a bit like the number "1" is a number, but at the same time a common
meter of all other numbers.