Written in honour of the Berlin systematic theologian Wolf Krötke, this paper gives an exposition of two propositions. (1) ‘A Christian dogmatics of the divine perfections is a positive science in the church of Jesus Christ whose task is the rational articulation of the singular identity of God the Holy Trinity, freely presented in the works of God's triune being.’ Christian dogmatics is a positive science concerned, not with deity as maximally perfect, but with the singular identity of God in his self-presentation as it is confessed in the sphere of the church. That identity is God's identity as Father, Son and Spirit, confessed as immanently complete and as operative in the economy of God's works. This is applied to the attributes of holiness and love in a further proposition: (2) ‘God's holiness is the majestic incomparability, difference and purity which he is in himself as Father, Son and Holy Spirit, and which is manifest and operative in the economy of his works in the love with which he elects, reconciles and perfects human partners for fellowship with himself.’ God's holiness is self-consecration to be the wholly unique being that he is. But as the triune God, his self-consecration includes his consecration of the creature as he singles out the creature for blessing in his works of election, reconciliation and sanctification. As such, God's holiness is operative as the love which maintains the creature's cause by eradicating all that hinders the creature's consecration to life in fellowship with God.