In Christ God has even worked a spiritual rebirth in us so that we are born of God. This alone qualifies us as God's children. Those not adopted in Christ and born again in Christ are not the children of God but are the children of the devil. It's rather significant that we are addressed here as God's children. For it is the very nature of children to imitate their parents.
Children naturally behave as their parents behave.
This is sometimes cute and amusing. At other times it is rather frightening, especially for the parent who knows his own sins and weaknesses. But imitate his parents every child does. This is the way God has made children, that they may learn from their parents. We too are children.