Infant baptism provides us with a beautiful picture of God's free grace toward us in Christ. This little baby is completely helpless, utterly dependent, totally vulnerable, unable to earn anything from anyone. But God, in His unfathomable grace and incomprehensible love, has provided a way of salvation in Christ and has promised to bless this covenant child and receive her into the family of God. It's pure gift, lavish grace. This is true of every child of God, but it's especially clear in the case of infants.
The calling of Herman and Shannon and all Christian parents is to demonstrate the exceedingly great hospitality and kindness of God toward their children. Christian parents are called to imitate the joy and delight, the protection and provision, the discipline and the nurture of our heavenly Father that is epitomized so clearly in the sacrament of baptism.
God doesn't save babies because they're cute—even though they are. Nor does God save babies because they're innocent and pure—because they're not. They are born sinners. Herman and Shannon have brought this child for baptism only because God has claimed the children of His people as His own. Infant baptism is not presumptuous because it is an act of faith in God's covenant promises:
-- "And I will establish my covenant between me and thee and thy seed after thee throughout their generations for an everlasting covenant, to be a God unto thee and to thy seed after thee." (Gen. 17:7)
-- "For to you is the promise, and to your children, and to all that are afar off, even as many as the Lord our God shall call unto him." (Acts 2:39)
-- "Believe on the Lord Jesus, and thou shalt be saved, thou and thy household." (Acts 16:31)