I often quote John 1:12 when I hear someone say something like "We're ALL children of God", or "We're ALL God's children"
Because if you emphasize 'them"
“But as many as received Him, to them gave He power to become sons of God, even to them that believe on his name” ( John 1:12)
the understanding is clear ... we're all God's creation, but we are not all His children
Additionally ... all God asks is for us to believe on the name of Jesus ..
Thank GOD for easy believism, because when I was saved, I was in no shape to analyze or parse a bunch of words and develop understanding .. I was a physical and psychological mess
You, however, are not in the flesh but in the Spirit, if in fact the Spirit of God dwells in you. Anyone who does not have the Spirit of Christ does not belong to him. But if Christ is in you, although the body is dead because of sin, the Spirit is life because of righteousness. If the Spirit of him who raised Jesus from the dead dwells in you, he who raised Christ Jesus from the dead will also give life to your mortal bodies through his Spirit who dwells in you.
For all who are led by the Spirit of God are sons of God. For you did not receive the spirit of slavery to fall back into fear, but you have received the Spirit of adoption as sons, by whom we cry, “Abba! Father!” The Spirit himself bears witness with our spirit that we are children of God, and if children, then heirs—heirs of God and fellow heirs with Christ, provided we suffer with him in order that we may also be glorified with him.