Thales
Water is everything
Thales was an ancient Greek philosopher and mathematician from Miletus, active around 600 BCE, traditionally considered the first Western philosopher.
He sought natural rather than mythological explanations for phenomena, reportedly predicting a solar eclipse and proposing that water was the fundamental substance of all things.
Thales proved that a circle is bisected by its diameter.
Celestial body blocks another
- predictionForecast of coming events
- solsticeDay of maximum tilt
- celestialOf the sky above
- navigationDetermining position and course
seasons · observation · calculation · cosmos · stars · constellations · Babylonian
Greek thought before dialectics
- HeraclitusPre-Socratic philosopher of flux
- PythagorasAncient Greek mathematician
- monismSingle-substance metaphysics
- naturalismWorldview excluding the supernatural
cosmology · metaphysics · ontology · rationalism · empiricism · dialectic · reason · deduction
Demonstrated logical conclusion
- circleCurved closed shape
- diameterDistance across through center
- triangleThree-sided plane figure
- angleGeometric measure of rotation
inscribed · semicircle · proof · deduction · intercept · proportionality · bisect · perpendicular
Basic substance or factor
- substancePhysical material with mass
- originStarting point or source
- moistureSmall amounts of liquid
- cosmogonyStudy of universal origins
materialism · naturalism · primordial · essence · transformation · unity · monism
eclipse
Celestial body blocks another
- predictionForecast of coming events
- solsticeDay of maximum tilt
- celestialOf the sky above
navigation · seasons · observation · calculation · cosmos · stars · constellations · Babylonian
pre-Socratic
Greek thought before dialectics
- HeraclitusPre-Socratic philosopher of flux
- PythagorasAncient Greek mathematician
- monismSingle-substance metaphysics
naturalism · cosmology · metaphysics · ontology · rationalism · empiricism · dialectic · reason · deduction · logic
theorem
Demonstrated logical conclusion
angle · inscribed · semicircle · proof · deduction · intercept · proportionality · bisect · perpendicular · axiom
element
Basic substance or factor
cosmogony · materialism · naturalism · primordial · essence · transformation · unity · monism
ThalesDemocritus
Ancient atomism's founder
Heraclitus · Pythagoras · Plato · Pythagoreans · Aristotle
ThalesHomer
Ancient Greek epic composer
Pythagoras · Moses · priests · temple priests · shamans