Louis Pasteur

Germ theory, pasteurization

Modern influential 62 sayings

Sayings by Louis Pasteur

The universe is asymmetric.

1848 — Referring to his discovery of molecular chirality.
Strange & Unusual Unverifiable

My passion for truth was the only guide of my life.

Late 19th Century (approx.) — Attributed, reflecting his lifelong commitment to scientific truth.
Strange & Unusual Unverifiable

It is by observation and experimentation that we discover the laws of nature.

Late 19th Century (approx.) — Attributed, summarizing his scientific methodology.
Strange & Unusual Unverifiable

The scientist has to be a poet in his heart and a logician in his mind.

Late 19th Century (approx.) — Attributed, emphasizing the blend of creativity and rigor in science.
Strange & Unusual Unverifiable

I am convinced that a day will come when every disease will have its specific remedy.

Late 19th Century (approx.) — Attributed, expressing his optimism for the future of medicine.
Strange & Unusual Unverifiable

The greatest victory is that over oneself.

Late 19th Century (approx.) — Attributed, a general philosophical statement.
Strange & Unusual Unverifiable

The more progress physical sciences make, the more they give us cause to believe that all phenomena are reducible to molecular forces.

Late 19th Century (approx.) — Attributed, reflecting his mechanistic view of nature.
Strange & Unusual Unverifiable

One must have a certain amount of daring to embark on a scientific career.

Late 19th Century (approx.) — Attributed, acknowledging the challenges inherent in scientific research.
Strange & Unusual Unverifiable

The cultivation of the soil is the noblest occupation of man.

Late 19th Century (approx.) — Attributed, showing a surprising appreciation for agriculture, perhaps linked to his work on ferment…
Strange & Unusual Unverifiable

Chance only favors the prepared mind.

1854 — Often cited as a paraphrase of his 1854 lecture. Slightly different wording than previous entry.
Strange & Unusual Confirmed

I am unable to find any experimental evidence that supports the doctrine of spontaneous generation.

1860s — Conclusion of his experiments disproving spontaneous generation.
Strange & Unusual Unverifiable

My dearest wife, I have arrived at the conclusion that the disease of silkworms is caused by a microbe.

1865 — Letter to his wife, Marie Pasteur, during his research on silkworm disease.
Strange & Unusual Unverifiable

The day will come when the microbe is both friend and foe.

Late 19th Century (approx.) — Attributed, foreshadowing the understanding of beneficial microbes.
Strange & Unusual Unverifiable

I owe everything to my wife, who has always encouraged me and shared my enthusiasm.

Late 19th Century (approx.) — Attributed, acknowledging his wife's support.
Strange & Unusual Unverifiable

The true scientist is a man of faith, for he believes in the order and harmony of the universe.

Late 19th Century (approx.) — Attributed, linking science and religious belief.
Strange & Unusual Unverifiable

We must not forget that science, like all human activities, has its limits.

Late 19th Century (approx.) — Attributed, a humble acknowledgment of the boundaries of scientific inquiry.
Strange & Unusual Unverifiable

The more I learn, the more I realize how much I don't know.

Late 19th Century (approx.) — Attributed, a common sentiment among great thinkers.
Strange & Unusual Unverifiable

I have been working so hard that I sometimes forget to eat.

Late 19th Century (approx.) — Attributed, reflecting his intense dedication to his research.
Strange & Unusual Unverifiable

The greatest error is to believe that one knows everything.

Late 19th Century (approx.) — Attributed, emphasizing humility in the pursuit of knowledge.
Strange & Unusual Unverifiable

I have great hopes that the vaccine against rabies will be a success.

1880s — Letter or statement during his work on the rabies vaccine.
Strange & Unusual Unverifiable