Session VI, Cannon 18 of the Council of Trent states: «If anyone says that the commandments of God are, even for one that is justified and constituted in grace, impossible to observe, let him be anathema.» (firstthings.com)
The Council of Trent makes this clear: «If anyone shall say that a marriage contracted, but not consummated, is not dissolved by the solemn religious profession of either one of the parties to the marriage, let him be anathema» (Sess XXIV Can vi). (firstthings.com)
When the nature of Christ and his gospel was challenged in the church of Galatia in ways less radical than it is by the Church of Latter - day Saints, St. Paul wrote, «But though we, or an angel from heaven, preach a gospel to you besides that which we have preached to you, let him be anathema.» (firstthings.com)