Leonardo da Vinci — "Every action needs to be prompted by a motive."
Every action needs to be prompted by a motive.
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More from Leonardo da Vinci
"I have been impressed with the urgency of doing. Knowing is not enough; we must apply. Being willing is not enough; we must do."
"The sun does not see its shadow."
"The greatest good is that which is chosen in preference to all others."
"The greatest pleasure and the greatest knowledge is to understand how we are born."
"The knowledge of all things is possible."
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Understanding this quote
What it means
Nothing happens without a reason driving it. Every decision, movement, or creation stems from an underlying purpose or force. Whether conscious or instinctive, a motivating cause precedes every act. Purposeless action is a contradiction — even seemingly random behavior has roots in some need, desire, or external pressure. Understanding what drives an action is essential to understanding the action itself, and to directing your own behavior deliberately.
Relevance to Leonardo da Vinci
Leonardo filled thousands of notebook pages asking why — why water spirals, why birds generate lift, why muscles contract. His anatomical dissections weren't morbid curiosity; they served a clear motive: painting the human form with biological truth. He abandoned commissions when intellectual drive faded, revealing that work without genuine motivation was unsustainable. This principle of purposeful causality was the engine behind his relentless cross-disciplinary investigations.
The era
During Leonardo's lifetime, medieval explanations of causality — God's providence, fate, celestial influence — were being challenged by Renaissance empiricism. Italian city-states funded engineers and natural philosophers to solve practical problems, demanding purposeful results. The printing press was spreading knowledge systematically, and figures like Leonardo were redefining expertise as rational inquiry rather than inherited tradition. Asserting that motives drive all actions aligned with the emerging belief that nature operates by discoverable, rational laws.
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