What does the Bible say about God's children?

According to Hebrews 2:10-18, the term 'children' refers specifically to those who have been given faith to believe in Christ and are therefore partakers of God's grace. Not everyone is a child of God by default; rather, the children of God are those who are born not of the will of the flesh but by the divine will of God (John 1:12-13). This distinction is important as it underscores the idea of grace and the sovereignty of God in the salvation process, where He has chosen a people for Himself.