Meaning

This statement draws a sharp and simple line between what helps human beings and what harms them. Knowledge here means understanding things as they actually are, which allows a person to act well and live a good life. Ignorance, by contrast, leads to poor choices, injustice, and suffering, not through any malice but simply through not knowing enough to do better. The claim is bold because it reduces the entire moral landscape to a single root cause on each side.

Context

This line is reported by Diogenes Laertius, an ancient writer who compiled accounts of the lives and sayings of Greek philosophers. Diogenes Laertius wrote several centuries after Socrates lived, so the line represents the tradition that gathered around Socratic thought rather than a direct transcript. It fits closely with the broader Socratic idea that wrongdoing is a form of ignorance, that people do bad things because they do not truly understand what is good. This idea made ethics and education inseparable in the Socratic worldview.

About the author

Socrates was a philosopher who lived in Athens in the fifth century BCE and who transformed the way subsequent generations thought about ethics, knowledge, and the examined life. He engaged ordinary citizens in dialogue, questioning their assumptions and exposing the limits of what they thought they knew. Because he left no written work, his ideas come to us through others, including Plato, Xenophon, and the later compiler Diogenes Laertius. Socrates was tried and executed by the Athenian state in 399 BCE, and his death became one of the defining moments in the history of philosophy.