Louis Pasteur:

Let me tell you the secret that has led me to my goal: my strength lies solely in my tenacity.

— Louis Pasteur Modern

Germ theory, pasteurization

Attributed, highlighting his perseverance.

Late 19th Century (approx.)

Verification

Confirmed

Found in 2 providers: grok,deepseek

Cross Reference

2 sources

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

"The universe is asymmetric."

"I am utterly convinced that there is a germ for every disease."

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

"Wine is the most healthful and hygienic of beverages."