Kurt Gödel

Mathematics Austrian-American 1906 – 1978 527 quotes

Proved incompleteness theorems transforming mathematical logic

Most quoted

"Any consistent formal system F within which a certain amount of elementary arithmetic can be carried out is incomplete; i.e., there are statements of the language of F which can neither be proved nor disproved in F."

— from On Formally Undecidable Propositions of Principia Mathematica and Related Systems, 1931

"Either mathematics is incompletable in this sense, that its evident axioms can never be exhausted by a finite number of formal rules, or else there exist mathematical problems which are undecidable in principle."

— from On Formally Undecidable Propositions of Principia Mathematica and Related Systems I, 1931

"The incompleteness theorems are a profound statement about the limits of formal systems and the indispensable role of human intuition and insight in mathematics."

— from On Formally Undecidable Propositions of Principia Mathematica and Related Systems I, 1931

All quotes by Kurt Gödel (527)

Leibniz was right about a universal language.

Essay on Leibniz

The consistency of arithmetic cannot be proved arithmetically.

Theorem 1931

Life's meaning is in the pursuit of truth.

Personal note

Set theory without choice is incomplete.

Paper 1938

Mathematics requires creativity beyond algorithms.

Lecture 1951

The incompleteness is a feature, not a bug.

Modern reflection

God has a plan for the universe, and it's mathematical.

Belief

Formalism fails where intuition succeeds.

Philosophy

My theorem changed the foundations forever.

Letter to mother 1931

Truth lies beyond the reach of proof in finite systems.

Paper 1931

I am a Platonist in mathematics.

Interview

The axiom of reducibility is unnecessary.

Russell's Logic 1944

Happiness comes from understanding the cosmos.

Reflection

Undecidable propositions exist in every strong system.

Theorem 1931

Einstein and I walked to work discussing only physics and philosophy.

Conversation recall 1950

The generalized continuum hypothesis is consistent.

Paper 1940

Logic alone cannot found mathematics.

Essay

Faith and reason are compatible.

Ontological proof 1970

My health prevents more discoveries.

Letter 1960

The infinite fascinates me.

Work on sets 1940