By Raymond de Souza, KHS, KofC, Church Militant - How can a Catholic man today fulfill the second commandment in the code of chivalry — to "defend the Church"? First, by believing all that the Church teaches and obeying all Her commandments... A further way is by studying apologetics, which is the art of explaining the Church's teachings to non-Catholics. Saint Peter is clear about the necessity of learning apologetics: "But sanctify the Lord Christ in your hearts, being ready always to satisfy every one that asketh you a reason of that hope which is in you" (1 Peter 3:15).