Written Into Each Other

In 2012, researchers at the Fred Hutchinson Cancer Research Center made a stunning discovery. When they examined the brain tissue of women who had died decades after their last pregnancy, they found male cells — cells carrying a Y chromosome that could only have come from a son. These fetal cells had crossed the placenta during pregnancy, traveled through the mother's bloodstream, and taken up residence in her brain, her heart, her liver. Some had been living there for more than forty years.

Scientists call this microchimerism — the presence of one person's cells living quietly inside another's body. But it works both ways. A mother's cells also cross into her child, where they have been detected functioning normally decades later.

Think about that. A mother literally carries pieces of her children within her body for the rest of her life. And her children carry pieces of her.

This is what love does. It does not just change how we feel — it changes what we are. When the Apostle Paul wrote that we are "members of one another," he was speaking a deeper truth than he knew. The God who knit us together in our mothers' wombs designed love to be not merely emotional but structural, woven into the fabric of our biology.

The love of the Almighty works the same way. Through Christ, He does not care for us from a distance. He dwells within us, and we in Him. Love, real love, always leaves something of itself behind.