Enrico Fermi

Physics Italian-American 1901 – 1954 565 quotes

Created first nuclear reactor, contributed to quantum theory

Most quoted

"A human being is a part of a whole, called by us universe, a part limited in time and space. He experiences himself, his thoughts and feelings as something separated from the rest... a kind of optical delusion of his consciousness. This delusion is a kind of prison for us, restricting us to our personal desires and to affection for a few persons nearest to us. Our task must be to free ourselves from this prison by widening our circle of compassion to embrace all living creatures and the whole of nature in its beauty."

— from Attributed

"The important thing is not to stop questioning. Curiosity has its own reason for existence. One cannot help but be in awe when he contemplates the mysteries of eternity, of life, of the marvelous structure of reality. It is enough if one tries merely to comprehend a little of this mystery each day."

— from Attributed

"Before we knew anything about the structure of the nucleus, we knew that it was very small. And we knew that it was very heavy. And we knew that it was very stable. And we knew that it was very energetic. And we knew that it was very mysterious."

— from Attributed

All quotes by Enrico Fermi (565)

In nuclear physics, the truth is often hidden behind a cloud of probabilities.

Professional observation 1950

The fact that we live at the bottom of a deep gravity well, on the surface of a gas-covered planet going around a nuclear fireball 90 million miles away, and think this is normal is obviously insane.

Personal reflection

Some escape some prison, but all escape the prison of life.

Attributed wisdom

Physics is the art of predicting the future based on the past.

Aphorism

We must be careful with our experiments; nature does not always cooperate.

Correspondence excerpt 1930

The atom is the basic unit of matter, but its secrets are profound.

Major work passage (Beta decay paper) 1934

Ignore the difficulties; they are temporary.

Letter 1940

Science progresses by trial and error, mostly error.

Witty remark

The Fermi paradox is the apparent contradiction between the lack of evidence for extraterrestrial civilizations elsewhere in the observable universe and various high estimates for their probability.

Discussion excerpt 1950

One must be careful not to confuse probability with certainty in quantum mechanics.

Lecture notes 1930

Life is like riding a bicycle; to keep your balance you must keep moving.

Attributed personal reflection

The first controlled chain reaction was a monumental step for humanity.

Speech 1942

In the end, we are all just particles in the cosmic dance.

Personal reflection

Experimental errors are inevitable, but learning from them is essential.

Interview quote 1950

The beauty of physics lies in its simplicity.

Nobel Lecture 1938

We cannot solve our problems with the same thinking we used when we created them.

Attributed aphorism

The neutron's discovery opened new doors to the atom's heart.

Paper excerpt 1934

Patience is the key to scientific discovery.

Correspondence

Humor is the best way to endure the absurdities of research.

Witty remark

The universe is vast, and we are small, but our curiosity is infinite.

Interview 1954