Galileo Galilei — "Ignorance is the parent of fear."
Ignorance is the parent of fear.
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More from Galileo Galilei
"I hold it to be an error to believe that the truths of faith and the truths of science are contradictory."
"The senses, though they are sometimes deceived, are not always so."
"I give infinite thanks to God, who has been pleased to make me the first observer of admirable things unrevealed to bygone ages."
"With the telescope, I have discovered many things that contradict the ideas of ancient philosophers."
"And finally, if the earth were to stop spinning, then the water in the oceans would fly off, and the mountains would crumble. So it must be moving."
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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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