Heartwood is the central supporting pillar of certain trees. Although dead, it won’t decay or lose strength while the outer, living layers are intact. Composed of fibers bound together by a chemical glue called lignin, heartwood can be as strong as steel. This element of a tree’s structure enables it to survive nature’s travails.
When Paul encouraged the Colossians to live a resurrected life, he could have used the metaphor of heartwood to express how those who have been saved, are transformed. “For you died, and your life is now hidden with Christ in God” (Colossians 3:3). While Paul’s reference to us as “dead” might seem discouraging, when understood from the perspective of the resurrection we grasp the hope of such a statement. God transforms the dead core of our beings, strengthening us in the power of the resurrected Jesus to endure the trials of this life.