What does the Bible say about the equality of believers in Christ?

In the book of James, it is emphasized that both the rich and the poor are one in Christ, having the same spiritual standing before God. This equality is based on the shared redemption through the blood of Christ, which cleanses all believers from sin, making them equally holy and forgiven. Regardless of our circumstances in life, whether we find ourselves in low or high estate, our identity and worth are rooted entirely in our relationship with Jesus. Thus, believers are united in Christ, transcending earthly distinctions.