both ceremonies – does that make this sacrament invalid? Are we in the midst of a crisis where all the priests and bishops who were ordained using this rite are not actually priests and bishops? To understand this, we’ll need to look at the form and matter of sacraments and answer a fundamental question – can the Church change the form of sacraments at all? And if the Church is allowed to make these changes, what needs to remain in order for a sacrament to be valid?