First comment on baptism?

According to the index at least...

"Baptism was instituted for this reason, as a sign of this true and supreme power of God's Word. As a real act on man, as an act of sovereign disposition, it proclaims for its part that man belongs to the sphere of Christ's lordship prior to all his experiences and decisions. Even before he can take up an attitude to God, God has taken up an attitude to him. Whatever attitude he may adopt, it will be done within and on the ground of the attitude that God has adopted to him. If he believes, this will be just a confirmation of the fact that he has God's promise and is claimed, judged and blessed by God. If he does not believe, this again will not be a possibility he can freely choose. He will sin against God's Word. He will not show himself to be free, but unfree. He will not choose, but will be rejected. He will grasp, not a possibility, but an impossibility. In a Word, in his very unbelief he will be measured by the Word of God and smitten by its power. This preceding attitude of God to him will make his unbelief unbelief, his sin sin. Only in the sphere of grace is there faith and unbelief, righteousness and sin. Only through the power of God's Word are there the two categories, those who are saved and those who are lost." CD I.1, p154