What is transubstantiation?

Transubstantiation is the complete change of the entire substance of bread and wine into the Body and Blood of Christ at the Eucharist, while the outward appearances (accidents) of bread and wine remain unchanged. Defined by the Fourth Lateran Council (1215) and reaffirmed by the Council of Trent, it is the Church's precise term for the real, true, and substantial presence of Christ in the Eucharist.

Why the Doctrine Matters

The doctrine invites the faithful to approach the Eucharist with profound reverence, knowing they receive not bread and wine, but the Lord Himself.