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)

The human mind is capable of understanding the infinite.

Conversation with Oskar Morgenstern

I believe in the possibility of a universal mind.

Letter to his mother

Either mathematics is too large for the human mind or the human mind is too small for mathematics.

Informal remark

The more I think about it, the more I realize that the world is a very strange place.

Letter to his mother

There are more things in heaven and earth, Horatio, than are dreamt of in your philosophy.

Quoting Shakespeare, often in conversation

My work on undecidability has shown that there are true mathematical statements that cannot be proven.

Lecture

The existence of God is a consistent hypothesis.

Philosophical argument (Gödel's ontological proof)

I am convinced that there are objective mathematical truths.

Discussion

The continuum hypothesis is undecidable.

Paper: 'What is Cantor's Continuum Problem?' 1963

The future is not predetermined.

Conversation

Mathematics is a part of physics.

Informal remark

The world is not a closed system.

Discussion

There are no contradictions in mathematics.

Lecture

The human mind can grasp the infinite.

Lecture

The universe is not absurd.

Conversation

My incompleteness theorems show the limitations of formal systems.

Lecture

Time travel is theoretically possible in some models of general relativity.

Paper: 'An Example of a New Type of Cosmological Solutions of Einstein's Field Equations of Gravitation' 1949

The foundations of mathematics are not purely formal.

Lecture

The concept of truth is fundamental.

Lecture

Mathematics reveals the structure of reality.

Lecture