Q. 33
Why is he called God's only-begotten Son, since we also are children of God?
A.
Because Christ alone is the eternal, natural Son of God. We, however, are children of God by adoption, through grace, for Christ's sake.
Scripture John 1:14 · John 1:12 · Galatians 4:4-7
Q. 34
Why do you call him our Lord?
A.
Because, not with gold or silver but with his precious blood, he has redeemed us body and soul from sin and from all the power of the devil, and has made us his own possession.
Scripture 1 Peter 1:18-19 · 1 Corinthians 6:20 · 1 Corinthians 7:23