I started writing this as a post for Fr. Mike Schmidt's Catechism in a Year group on facebook, then I realized it had drifted very off topic, so I'm putting it here. I hope that we start with an understanding of what the catechism is. There is much confusion these days between dogma, doctrine, and discipline; and the Catechism is doctrine. Dogma is the foundation- it's the deposit of faith the Apostles received from Christ, and has not changed in 2000 years. It's supposed to not change; it's the bedrock of the faith of Peter. If dogma changes, we're in very deep and have essentially started teaching against the gospels. Even many of our separated brethren, be they ethnic orthodox or Protestant, hold to dogma; they'll usually pick some inflection point where Catholicism appeared to separate from dogma as the sticking point causing the branch. To avoid schism, we must avoid such sticking points! Changing the definition of a sacrament, for instance, as...