Who teaches that God is the Truth, and that all truth ultimately comes from God who is unchanging and perfect?

• A. Aristotle
• B. Aquinas
• C. Descartes
• D. Augustine

Answer: (B)

Truth understood as a divine, unchanging source is the idea being tested. Think of truth as something grounded in the nature of God—God is absolute, unchanging, and perfect, so the truths we know reflect that fixed reality. Thomas Aquinas makes this link explicit: he treats God as the source and standard of all truth, and he emphasizes God’s immutability as the guarantee that truth is stable and universal. Because God does not change, the truths we discover about the world aren’t subjective or shifting; they flow from a fixed divine reality that undergirds being and knowing. Among the options, Aquinas best embodies this view, offering a systematic account that all truth ultimately comes from God and that God’s perfection grounds the reliability of truth in human thinking. (Augustine also speaks of God as truth, but Aquinas presents the clearest scholastic articulation of truth as emanating from the divine source.)