Within Christianity, there tend to be three major views of the place of excommunication: (1) We shouldn't excommunicate anyone, because it's not merciful. (2) We should excommunicate, because we want to purify the Church of the damned. (3) We should excommunicate, because it's merciful to sinners. So which of these views is the one endorsed by Scripture?
The Catholic Church requires all aspiring priests and deacons to request ordination, and then to be called by their bishop. Why does she do that? Because it's the Biblical model. And this explains where the women's ordination movement, and the Protestant Reformation, have gone wrong.
Contemporary Christianity is fond of pushing Jesus without the Church. Like its secular counterpart (in which people claim to be "spiritual, but not religious"), it's an attempt to have the relationship without the rules. If I'm lonely or going through a tragedy, I can pray, but I don't have to worry about fasting when I don't want to, or being associated with a bunch of fellow believers that I look down upon. But Jesus-without-the-Church is a rejection of Jesus.
If St. Paul is teaching transubstantiation in 1 Corinthians 10-11, why does he refer to the Eucharist as "the bread"?
A saintly theologian weighs in on the post-Conciliar chaos.
There's a spiritual malady afflicting our homes, our workplaces, our political conversations, and how we speak to (and of) one another, both on- and offline. A major part of the cure is learning to recognize that those who are hardest to stand are often the ones closest to us, and that the call to charity is often in the little things of daily life.
Why should we care about the writings of the Church Fathers, or early Church history? Consider the Church of the early 100s. Protestants typically (a) reject the doctrine of the Real Presence of Christ, that the Eucharist becomes His Flesh and Blood; and (b) believe that once you are saved, you'll never permanently fall away from the faith. But holding these views would require believing that the very same Symrnaean and Ephesian Christians praised by Christ in 96 A.D. are heretics by 107 A.D.
Certain Protestants have taken to referring to the Scriptures as "66 love letters." That gets something fundamentally right about God's revelation, but goes wrong in three ways.
It's frequently objected that the Catholic Church doesn't look like the early Church. Good. It's not supposed to.
The "infallibility problem" in Eastern Orthodoxy is more similar to the infallibility problem in Protestantism than you may realize. In each case, rejection of centralized infallibility leaves them with fallible (and hazy) collections of infallible teachings.