The Blood That Carries Another's Name

In bone marrow transplantation, something remarkable happens. After the donor's marrow engrafts, the recipient's blood cells begin carrying the donor's DNA. Hematologists call this "chimerism" — named after the mythical creature composed of different animals. Run a DNA test on the patient's blood, and it comes back as someone else entirely.

But the patient must first endure a brutal process. Chemotherapy destroys their own marrow — their body's ability to make blood is wiped clean. For days they exist in a vulnerable, depleted state, entirely dependent on the transplanted cells to take root. They cannot rush engraftment. They cannot will it into being. They can only wait and trust.

And when engraftment comes, the new marrow doesn't simply patch what was broken. It replaces it. The patient's blood tells a different story now — one written in another person's DNA.

Paul wrote to the Corinthians, "If anyone is in Christ, the new creation has come: the old has gone, the new is here." Faith asks something similar of us. We must release our old ways of sustaining ourselves — our self-made righteousness, our careful record-keeping of personal merit — and trust that what God transplants into us will take root.

The life that flows through us afterward isn't something we manufactured. It carries Another's name. And that is exactly the point.