Since we know now what Baptism is and how it is to be regarded, we must also learn why and for what purpose it is institution. We must learn what it profits, gives, and works. For this also we cannot find a better resource than Christ’s words quoted above, “Whoever believes and is baptized will be saved” [Mark 16:16]. Therefore, state it most simply in this way: the power, work, profit, fruit, and purpose of Baptism is this– to save [1 Peter 3:21]. For no one is baptized in order that he may become a prince, but, as the words say, that he “be saved.” We know that to be saved is nothing other than to be delivered from sin, death, and the devil [Colossians 1:13-14]. It means to enter into Christ’s kingdom [John 3:5], and to live with Him forever.
–Large Catechism, Part IV.
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