"The Spirit himself bears witness with our spirit that we are children of God."
Romans 8:16
This is a remarkable truth that should elicit awe and assurance in such measure that nothing is able to usurp it. When the Holy Spirit inspired Paul to pen those words, he meant to etch into the hearts for God's children that they are esteemed by God in like measure as his son the Christ.
Christ himself taught us to pray "our father". This is instructive. Scriptures are replete with such pronouncements and narratives that indicate the kind of relationship we have with God. It is a father and child relationship with all the attendant privileges available to children.
We must affirm and assume this as our reality as children of God, that we may enjoy the full measure of his love for us. The confidence we need to thrive as God's children has been graciously dispensed to us in Christ, as co-heirs with him in the kingdom of his father, who is also our father.