Summa TheologiaePart III — Third Part Question 066 — Question 66 — Baptism Prooemium Article 1 — Whether Baptism is the mere washing? Article 2 — Whether Baptism was instituted after Christ’s Passion? Article 3 — Whether water is the proper matter of Baptism? Article 4 — Whether plain water is necessary for Baptism? Article 5 — Whether this be a suitable form of Baptism: “I baptize thee in the name of the Father, and of the Son, and of the Holy Spirit”? Article 6 — Whether Baptism can be conferred in the name of Christ? Article 7 — Whether immersion in water is necessary for Baptism? Article 8 — Whether trine immersion is essential to Baptism? Article 9 — Whether Baptism may be reiterated? Article 10 — Whether the Church observes a suitable rite in baptizing? Article 11 — Whether three kinds of Baptism are fittingly described—viz. Baptism of water, of blood, and of the Spirit? Article 12 — Whether the Baptism of blood is the most excellent of these?