Thales — Greek Philosopher

Thales of Miletus was a pre-Socratic Greek philosopher and mathematician from Miletus in Asia Minor and one of the Seven Sages of Greece. Many, most notably Aristotle, regard him as the first philosopher in the Greek tradition. Aristotle reported Thales' hypothesis that the originating principle of nature and the nature of matter was a single material substance: water... (wikipedia)

There are three attributes for which I am grateful to Fortune: that I was born, first, human and not animal; second, man and not woman; and third, Greek and not barbarian.
Nothing is more active than thought, for it travels over the universe, and nothing is stronger than necessity for all must submit to it.
Hope is the only good that is common to all men; those who have nothing else possess hope still.
The most difficult thing in life is to know yourself.