Paul Dirac

Physics English 1902 – 1984 692 quotes

Predicted antimatter and formulated Dirac equation

Most quoted

"The underlying physical laws necessary for the mathematical theory of a large part of physics and the whole of chemistry are thus completely known, and the difficulty is only that the exact application of these laws leads to equations much too complicated to be soluble. It is the purpose of theoretical physics to show that it is possible to derive, from these equations, the properties of the actual world."

— from Proceedings of the Royal Society, 1929

"The methods of progress in theoretical physics have undergone a vast change during the present century. The classical tradition has been to consider the world to be an association of observable objects (particles, fluids, fields, etc.) moving about according to definite laws of force, so that one could form a mental picture in space and time of the whole scheme."

— from Quantised Singularities in the Electromagnetic Field, 1931

"The most powerful method of advance that can be suggested at present is to employ all the resources of pure mathematics in attempts to perfect and generalise the mathematical formalism that forms the existing basis of theoretical physics, and after each success in this direction, to try to interpret the new mathematical features in terms of physical entities."

— from Quantised Singularities in the Electromagnetic Field, 1931

All quotes by Paul Dirac (692)

Science progresses through bold conjectures and rigorous proofs.

Attributed 1940

I prefer to work alone on my ideas.

Interview 1950

The Dirac comb is a useful mathematical tool.

Paper 1940

Nature seems to take advantage of the simple mathematical truths.

Lecture 1965

My prediction of the positron was based on mathematical consistency.

Speech 1931

Life is a search for beauty in the equations of nature.

Personal reflection 1970

Quantum electrodynamics requires renormalization.

Paper with Feynman and Schwinger 1948

I was influenced by the works of Lorentz and Einstein.

Letter 1925

The universe is infinite in all directions.

Speculation 1930

Mathematics allows us to understand the unseen.

Lecture 1955

My Nobel lecture was on the theory of the positron.

Nobel speech 1933

I don't believe in free will; it's determined by laws.

Interview 1975

The bra-ket notation simplifies quantum calculations.

Book 1939

Childhood in Bristol was quiet and studious.

Autobiography 1977

Symmetry is key to physical laws.

Lecture 1960

I collaborated with Oppenheimer on quantum theory.

Correspondence 1926

The meaning of life is to find beauty in the physical world.

Late reflection 1980

Large numbers in physics are suspicious.

Paper 1937

I enjoyed sailing as a hobby.

Interview 1965

The cosmological constant was a mistake, but perhaps not.

Comment on Einstein 1970