You must learn all things: both the steadfast heart of well-rounded Truth and the opinions of mortals, in which there is no true trust.
χρεὼ δέ σε πάντα πυθέσθαι ἠμὲν Ἀληθείης εὐκυκλέος ἀτρεμὲς ἦτορ ἠδὲ βροτῶν δόξας, ταῖς οὐκ ἔνι πίστις ἀληθής
Philosophers
Parmenides
A pre-Socratic philosopher born in the late 6th century BCE in the Greek colony of Elea in southern Italy. In his didactic poem On Nature, Parmenides declared 'what is, is; what is not, is not,' dismissing change and plurality as sensory illusion. His ontological monism became the foundation of the Eleatic school, and through Zeno's paradoxes and Plato's Theory of Forms, it established the starting point of Western metaphysics. He is often called the founder of ontology.
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Parmenides's Other Quotes
Related Quotes
No sign is so clear that it does not also carry some obscurity
-- John Calvin
For thinking and Being are the same.
-- Parmenides
I know that I know nothing.
-- Socrates
Imagine prisoners chained underground since childhood, seeing only shadows on a wall and taking them for reality.
-- Plato
Color exists by convention, sweet by convention, bitter by convention; in reality there are only atoms and void.
-- Democritus
The limits of my language mean the limits of my world.
-- Ludwig Wittgenstein