Quote by Peter Kreeft
“Reason is His voice, His interior prophet, in our souls. We call that prophet conscience. (St. Thomas used two terms for it: “synderesis” was the awareness of its reality and truth and authority and rules, and “conscience” was the application of it. We use “conscience” for both.) Conscience is essentially the power of reason to know good and evil.”
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Peter John Kreeft is a professor of philosophy at Boston College and The King's College, and author of numerous books as well as a popular writer on Christian theology, and specifically Roman Catholic apologetics. He also formulated together with Ronald K. Tacelli, SJ, "Twenty Arguments for the Existence of God".
Kreeft took his A.B. at Calvin College (1959), and an M.A. at Fordham University (1961). In the same university he completed his doctoral studies in 1965. He briefly did post graduate studies at Yale University. He joined the Philosophy faculty of the Department of Philosophy of Boston College in 1965. In 1994 he was a signer of the document Evangelicals and Catholics Together.