the Body, and of the whole substance of the wine into the Blood – the species only of the bread and wine remaining – which conversion indeed the Catholic Church most aptly calls Transubstantiation". This council officially approved use of the term "transubstantiation" to express the Catholic Church's teaching on the subject of the conversion of the bread and wine into the body and blood of Christ in the Eucharist, with the aim of safeguarding Christ's presence as a literal truth, while emphasizing the fact that there is no change in the empirical appearances of the bread and wine. It did not however impose the Aristotelian theory of substance and accidents: it spoke only of the species (the appearances), not the philosophical term "accidents", and the word "substance" was in ecclesiastical use for many centuries before Aristotelian philosophy was adopted in the West, as shown for instance by its use in the Nicene Creed which speaks of Christ having the same "" (Greek) or "" (Latin) as the Father. Since the Second Vatican Council The Catechism of the Catholic Church states the Church's teaching on transubstantiation twice. It repeats what it calls the Council of Trent's summary of the Catholic faith on "the conversion of the bread and wine into Christ's body and blood [by which] Christ becomes present in this sacrament", faith "in the efficacy of the Word of Christ and of the action of the Holy Spirit to bring about this conversion": "[B]y the consecration of the bread and wine there takes place a change of the whole substance of the bread into the substance of the body of Christ our Lord and of the whole substance of the wine into the substance of his blood. This change the holy Catholic Church has fittingly and properly called transubstantiation". As part of its own summary ("In brief") of the Catechism of the Catholic Church on the sacrament of the Eucharist, it states: "By the consecration the transubstantiation of the bread and wine into the Body and Blood of Christ is brought about. Under the consecrated species of bread and wine Christ himself, living and glorious, is present in a true, real, and substantial manner: his Body and his Blood, with his soul and his divinity (cf. Council of Trent: DS 1640; 1651)." The Church's teaching is given in the Compendium of the Catechism of the Catholic Church in question