Socrates and Lennon are having an argument
“The unexamined life is not worth living” and “life is what happens when you’re busy making other plans” cannot both be entirely right, and the tension between them is the most useful thing in this room. Socrates is warning against a life you never inspect. Lennon is warning against inspecting instead of living. Kierkegaard, twenty-four centuries after one and a hundred and forty years before the other, quietly explains why both are true: understanding runs backwards while living runs forwards, so you are always doing one of them at the wrong time.
The best-documented room in the building
Fourteen of these nineteen lines carry an exact citation — a work, a chapter, a date — which is the highest proportion anywhere in the museum. The span runs from Socrates in 399 BC to 2011. There is a reason the biggest subject produces the cleanest evidence: lines about life tend to come from long books by people whose long books were kept. The themes that resist verification are the ones whose best lines were spoken rather than written.
What is the most famous quote about life?
Socrates’s “the unexamined life is not worth living”, recorded by Plato in the Apology around 399 BC — said at his own trial, where the alternative to exile was execution.
Did John Lennon write “life is what happens when you’re busy making other plans”?
He sang it in Beautiful Boy (Darling Boy) in 1980, and it is the reason the line is famous. A very similar sentence appeared in Reader’s Digest in 1957 under the name Allen Saunders, so Lennon popularised it rather than coined it.