What does the Bible say about separation for Jesus' sake?

In Hebrews 13:11-13, we see the call to separate from worldly institutions and practices that do not honor Christ. The author highlights the significance of going 'without the camp' to bear the reproach of Jesus. This call to separation is not merely a physical act but a spiritual one, affirming that to truly follow Jesus, believers may face rejection and persecution from those who remain in the old ways, particularly in religious traditions that do not align with the gospel. This theme resonates throughout Scripture, emphasizing the importance of loyalty to Christ over societal acceptance.