Thomas d'Aquin (1224/6—1274) St. Thomas Aquinas was a Dominican priest and Scriptural theologian. He took seriously the medieval maxim that “grace perfects and builds on nature; it does not set it aside or destroy it.” Therefore, insofar as Thomas thought about philosophy as the discipline that investigates what we can know naturally about God and human beings, he thought that good Scriptural theology, since it

Karl Popper: Political Philosophy Among philosophers, Karl Popper (1902-1994) is best known for his contributions to the philosophy of science and epistemology. Most of his published work addressed philosophical problems in the natural sciences, surtout la physique; and Popper himself acknowledged that his primary interest was nature and not politics. Toutefois, his political thought has arguably had as great an impact as has his philosophy of

Xénophon (430—354 B.C.E.) Xenophon was a Greek philosopher, soldier, historien, memoirist, and the author of numerous practical treatises on subjects ranging from horsemanship to taxation. While best known in the contemporary philosophical world as the author of a series of sketches of Socrates in conversation, known by their Latin title Memorabilia, Xenophon also wrote a Symposium and an Apology which present a set of vivid

d'Aquin: Philosophical Theology In addition to his moral philosophy, Thomas d'Aquin (1225-1274) is well-known for his theological writings. He is arguably the most eminent philosophical theologian ever to have lived. To this day, it is difficult to find someone whose work rivals Aquinas’ in breadth and influence. Although his work is not limited to illuminating Christian doctrine, virtually all of what he wrote is shaped by

Persistence in Time No person ever steps into the same river twice—or so goes the Heraclitean maxim. Obscure as it is, the maxim is often taken to express two ideas. The first is that everything always changes, and nothing remains perfectly similar to how it was just one instant before. The second is that nothing survives this constant flux of change. Where there appears to