From Luthers Large Catechism as he comments on the three articles of the Creed
Although the whole world has sought painstakingly to learn what God is and what he thinks and does, yet it has never succeeded in the least. But here you have everything in richest measure. In these three articles God has revealed and opened to us the most profound depths of his fatherly heart, his sheer, unutterable love. He created us for this very purpose, to redeem and sanctify us. Moreover… we could never come to recognise the Father’s favour and grace were it not for the Lord Christ, who is the mirror of the Father’s heart. Apart from him we know nothing but an angry and terrible judge. But neither could we know anything of Christ, had it not been revealed by the Holy Spirit.
