practical man rather than a sophist?” ‘ “But what greater deed,” I replied, “could one perform than to prove that reason3 rules all, and that one who rules reason and is sustained by it can look down upon the errors and undertakings of others, and see that they do nothing reasonable or pleasing to God. Man cannot have prudence without philosophy and straight thinking. Thus, every man should be devoted to philosophy and should consider it the greatest and most noble pursuit; all other pursuits are