What does the Bible say about being holy brethren?

In Hebrews 3:1, believers are referred to as 'holy brethren', indicating that their holiness comes not from their own works but from their union with Christ. This holiness is derived from the righteousness of Christ, who was made sin for us, so that we might become the righteousness of God in Him. This highlights the Christian doctrine of imputed righteousness, where the believers are seen as holy because of what Christ has done. Furthermore, the concept reinforces the identity of believers as a community of grace, called to live in light of their Savior’s redemptive work.