Lord's Day 13: How are we "God's Children" and What Follows from the Answer to that Question?

Here is the text from Lord's Day 13, which is our Sunday School lesson for tomorrow.  As you can see, it is made up of Question 33 and Question 34 of the Heidelberg Catechism.  As you may recall, we are in the part of the HC that addresses the matter of "God the Son."
 

(Be sure to read the scripture references, if you have a chance.  I also have some questions further below, after Questions 33 and 34.)

Lord’s Day 13

Q & A 33

Q. Why is he called God’s “only begotten Son”
when we also are God’s children?

A. Because Christ alone is the eternal, natural Son of God.¹
We, however, are adopted children of God—

adopted by grace through Christ.²

¹ John 1:1-3, 14, 18; Heb. 1
² John 1:12; Rom. 8:14-17; Eph. 1:5-6

Q & A 34

Q. Why do you call him “our Lord”?

A. Because—

not with gold or silver,
but with his precious blood—¹

he has set us free

from sin and from the tyranny of the devil,²

and has bought us,

body and soul,

to be his very own.³

¹ 1 Pet. 1:18-19
² Col. 1:13-14; Heb. 2:14-15
³ 1 Cor. 6:20; 1 Tim. 2:5-6

1.  In what way are we, as children of God, not like Jesus as God's child, in terms of our nature?

2.  How are we like Jesus in terms of our relationship to God.  And not like him?

3.  Is everyone a "child of God," as people are often fond of saying?  What do people mean when they say, "We are all children of God?"   (How do we deal with Hitler and Stalin?  Do we simply say that they were "inhuman" and go on?)

4.  What use is it to be a child of God?  Why should anyone care?

5.  Does it seem odd that in QA34, "gold or silver" is contrasted "with his precious blood," in terms of what liberates us from "sin and from the tyranny of the devil?" Isn't gold and silver a path to liberation?

6.  Why should we want to  be the Son's "very own" or, the "very own" of sin and the devil, which seems to be the default status?  Are those really the only choices?  (And, besides, many of us seriously doubt that there is  even a devil, even those of us willing to concede at least an "historical" Jesus of some sort.)

7.  In fact, why can't I be my very own? Why can't I belong to myself alone?  Isn't that really the current project, to be one's own?