RT Article T1 The Headship of Christ and the Angels: An Ambiguity in Thomas’s Account JF New blackfriars VO 105 IS 1 SP 92 OP 103 A1 Lim, Joshua Han LA English PB Cambridge University Press YR 2024 UL https://www.ixtheo.de/Record/1884549632 AB The development of Thomas’s teaching on Christ’s headship relies upon the principle of the causality of the maximum: ‘the maximum in a genus is the universal cause in that genus’. This principle appears in the fourth way to demonstrate God’s existence. Applied to the humanity of Christ, Thomas argues that Christ, on account of his perfect fullness of grace, is, according to his humanity, the universal source of grace for all the members of the Church, including the angels. How does this cohere with Thomas’s teaching elsewhere in the Summa theologiae that it is only as Word that Christ causes grace in the angels? In this paper, I explore this tension and offer a way of understanding Thomas’s broader approach to the mystery of Christ. K1 Thomas Aquinas K1 Summa Theologiae K1 Medieval Theology K1 Grace K1 Christology K1 Angelology DO 10.1017/nbf.2023.11