Wisdom Quotes
“All I know is that I know nothing” is flagged as misattributed to Socrates. The nearest thing in Plato is the end of Book I of the Republic, where Socrates concludes that he knows nothing about what justice is. That is a narrower claim than the slogan, and part of an argument rather than a statement about himself.
Most of the entries here come from poets and playwrights, with Shakespeare, Edward Young and Pope at the top, which fits: wisdom is rarely stated in a sentence of its own, more often spoken by a character or tucked into a couplet. For the sourced ones, William James in The Principles of Psychology (1890): “The art of being wise is the art of knowing what to overlook.” Or Blake, in The Marriage of Heaven and Hell (1790): “If the fool would persist in his folly he would become wise.”
By Wisdom wealth is won;
But riches purchased wisdom yet for none.
Quantum est in rebus inane!
How much folly there is in human affairs.
Wisdom enough to leech us of our ill
Is daily spun; but there exists no loom
To weave it into fabric