Who knows but life be that which men call death,
And death what men call life?

The lines voice a radical skepticism about human certainties, especially the boundary we assume between life and death. Euripides frames death not as an absolute negation but as something whose meaning depends on perspective and knowledge we do not possess. The thought aligns with a strain of Greek philosophical reflection (often associated with Socratic/Platonic paradox) that treats ordinary experience as potentially deceptive and suggests that what we fear may be a transition rather than an end. In tragedy, such a reversal also undercuts complacency: if our categories can invert, then human judgment is fragile, and humility before the unknown becomes a moral stance.