3 thinkers, books, and ideas connected to this field.
The surviving fragments of Heraclitus's philosophical writing — preserved in quotations by later writers — containing his doctrine of universal flux, the unity of opposites, and the Logos — the most philosophically dense collection of pre-Socratic philosophy.
Ancient Greek pre-Socratic philosopher — known as 'the Obscure' — author of the fragments containing his doctrine of universal flux, the unity of opposites, and the Logos — whose ideas influenced Stoicism and (through John's Gospel) Christianity.
Milesian philosopher traditionally regarded as the first Greek philosopher — who argued that all things are made of water — and who predicted a solar eclipse and demonstrated that philosophy can be profitable (cornered the olive press market by predicting a good harvest).