What does it mean that believers are trees of righteousness?

Isaiah 61:3 states, 'to grant to those who mourn in Zion—to give them a beautiful headdress instead of ashes, the oil of gladness instead of mourning, the garment of praise instead of a faint spirit; that they may be called oaks of righteousness, the planting of the Lord, that he may be glorified.' This metaphor emphasizes the strength, stability, and fruitfulness of believers who are rooted in Christ. As trees of righteousness, believers are meant to bear spiritual fruit that manifests God's character and purpose in the world. This imagery reinforces the idea that our lives, transformed by grace, are intended to bring glory to God and serve as a testament to His transformative power.