Galileo Galilei — "Ignorance is the parent of fear."
Ignorance is the parent of fear.
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More from Galileo Galilei
"I know that I am mortal, and that my life will pass away like a shadow; but I hope that my discoveries will live on."
"To command the sun and moon, God must have given them motion."
"I hold the sun to be situated motionless in the center of the revolution of the celestial orbs while the earth revolves around the sun."
"The universe is an immense, eternal, and infinite work, which can be understood only by the one who created it."
"My dear Kepler, what would you say of the learned here, who, replete with the pertinacity of the asp, have steadfastly refused to cast a glance through the telescope? What shall we make of this? Shall…"
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Often attributed, but a common philosophical sentiment, not uniquely Galileo's.
Date: Uncertain
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Understanding this quote
What it means
Fear grows in the dark of not knowing. When we lack understanding of something—disease, death, the unknown cosmos—our minds fill the void with dread. Knowledge acts as a light that drives out that fear. The more clearly we understand how the world works, the less power the unknown holds over us. Understanding, not reassurance, is the true remedy for fear.
Relevance to Galileo Galilei
Galileo spent his career replacing superstition with observation. When he confirmed the heliocentric model through his telescope, he directly challenged the Church's authority over cosmic knowledge. In 1633, the Inquisition tried him for heresy—an institution whose power rested partly on keeping laypeople ignorant of natural truths. His willingness to publish findings despite danger embodied the belief that expanding knowledge, not deferring to authority, liberates humanity from fear.
The era
In early modern Europe, the Church and Aristotelian tradition controlled acceptable knowledge. Astronomical events like comets were interpreted as divine omens, disease as God's punishment, and Earth's movement as heresy. Fear of the unknown—and of challenging official doctrine—kept most people silent. Galileo's era was a turning point where empirical science began displacing theological fear-based explanations, though at enormous personal cost to those who dared question established truth.
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