Thomas Aquinas — "The intellect is perfected by truth, and the will by good."
The intellect is perfected by truth, and the will by good.
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Understanding this quote
What it means
Your mind reaches its fullest potential when it correctly grasps reality — when it holds true beliefs rather than false ones. Your will, the faculty that chooses and desires, reaches its fullest potential when directed toward genuine good rather than illusion or vice. Human flourishing requires both: clear thinking and right wanting. Neither compensates for the other. A sharp mind serving bad ends, or good intentions built on false beliefs, both fall short.
Relevance to Thomas Aquinas
Aquinas devoted his life to demonstrating that human reason and Christian faith are compatible, not rivals. As a Dominican friar and professor at Paris, he spent decades in the Summa Theologica mapping how intellect pursues truth and will pursues good — both ultimately converging in God, who is Truth and Goodness itself. This quote is his anthropology in miniature: humans are defined by two faculties, and both must be rightly ordered to reach their end.
The era
In the 13th century, Aristotle's works were flooding back into Western Europe via Arabic translations, sparking fierce debate: could pagan philosophy coexist with Christian theology? Church authorities at Paris initially condemned Aristotelian ideas. Universities were newly formed, and reason was asserting itself against pure scriptural authority. Aquinas's claim that intellect and will each have proper objects — truth and good — was his answer: reason is legitimate, it just needs to be rightly directed.
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