Learning Never Exhausts The Mind

This line appears in Leonardo's manuscript notebooks, likely written during his Milanese period (c. 1490s) when he was most prolific as both artist and scientist. Da Vinci filled thousands of notebook pages — now dispersed across codices in Paris, Milan, Windsor, and London — with observations on anatomy, mechanics, optics, and art theory. His belief that study and inquiry were inexhaustible runs throughout these notes, framing learning as a lifelong process rather than a finite achievement.