What does the Bible say about Christ being in all believers?

In Colossians 3:11, it is declared that there is neither Greek nor Jew, circumcision nor uncircumcision, barbarian, Scythian, bond nor free; but Christ is all, and in all. This emphasizes the unity of believers in Christ. Each individual, regardless of cultural or societal differences, shares the same Lord and Savior, bringing them together as one body in the Spirit. This truth underscores the significance of understanding that our identity in Christ transcends our earthly distinctions.