Why is it significant that Jesus calls us His brethren?

In Hebrews 2:11, we learn that Jesus is not ashamed to call believers 'brethren' because we share a common relationship through faith. This familial bond signifies that Christ, through His life, death, and resurrection, has made a way for us to be united with Him, elevating us from spiritual orphans to children of the Most High. By using the term 'brethren,' Jesus indicates that those who believe in Him have a unique and loving relationship with Him as their elder brother, which reflects the promises of grace and inheritance that belong to us as sons and daughters of God.