The Church, like a nation, must defend herself and her faith. She must fight for the truth and for the salvation of souls. This demands doing battle, for which reason we call ourselves the Church Militant. Like a nation, however, the Church also encounters a danger: that the fighting spirit of the Church Militant turn against her. The danger is not of fighting—but of only fighting, and fighting in the wrong way. The danger is that the Church become not the New Jerusalem, but the New Sparta. And Sparta was known for only one thing: fighting. Ruthlessly, effectively, heroically at times, but only fighting. Sparta produced no great artwork, poetry, plays, or philosophy. It produced only war.

…Those who constantly challenge and criticize cannot be taught. They may be able to pick apart goofy catechesis and spot liturgical abuse from a mile away. But they cannot learn, because they never stop questioning, criticizing, picking things apart. The criticism results in a cynicism borne (ironically) of a zeal for truth. If we refuse to trust anyone, then we set ourselves up as our own personal magisterium. And we have a name for that: Protestantism.
Further, the constant criticizing quickly becomes just complaining. And there is plenty to complain about. So we sit around and swap anecdotes about how bad Mass is at that parish, and how bad that school is, and what bishop so-and-so did or didn’t do…and so on. We may be dead right on every point. But so what? At the end of the complaining, have we become holier? Have we grown in the interior life? And what attitude have we fostered in those around us?
Some of our greatest saints saw similar, and worse, crises. Yet they did not leave us an example of complaining. The hallmark of Christians is charity, not churlishness. The pagans were moved by the Christians: “See how they love one another”—not “See how they complain to one another.”