What does it mean that Jesus calls believers 'brethren'?

In John 20:17, the term 'brethren' is significant; it establishes a personal and familial connection between Christ and believers. This concept is echoed in Hebrews 2:11, where it states that Christ is not ashamed to call us His brethren. This relationship implies that believers share in the same spiritual lineage and inheritance as Christ; we are united with Him not only in His suffering but also in His glory. This truth brings comfort and assurance, affirming our identity as children of God and members of His family through faith in Jesus.