The Mystery of the Heart — Unity Series
After revisiting an older post I wrote years ago about the heart, I realized that God has been showing me even more about this subject. What began as a simple reflection has grown into a deeper understanding of why the Bible speaks of the heart so often and so directly. Instead of rewriting the old post, I felt led to create a new one—one that gathers both the original thoughts and the new insights Father God has been revealing.
This Unity Series post continues that journey. It builds on what I once understood and adds the clarity, wonder, and awe that have come as I’ve looked again at Scripture, science, and the way God designed us. Sometimes revisiting something familiar opens a door to something brand new.
The Mystery of the Heart — Unity Series
Genesis 8:21 (NIV)
“The Lord smelled the pleasing aroma and said in his heart…”
Deuteronomy 4:29 (NASB)
“…you will find Him if you search for Him with all your heart and all your soul.”
Deuteronomy 4:39 (NASB)
“…take it to your heart that the Lord, He is God…”
Deuteronomy 6:5 (NASB)
“You shall love the Lord your God with all your heart…”
Why Scripture Speaks of the Heart
These verses are only a small glimpse of how often the Bible speaks of the heart—its condition, its inclinations, and its role in our relationship with God. For years, I assumed “heart” was simply a poetic way of referring to the brain—our thoughts, reasoning, and emotions. After all, the heart is just a pump… or so I thought.
But Scripture uses the word heart in a way that goes far deeper than emotion. In Hebrew (lēb, lēbāb) and Greek (kardia), the heart refers to the inner control center of a person—the place where thoughts are formed, decisions are made, desires are shaped, conscience is stirred, and faith is either received or rejected.
Where modern people separate “mind,” “emotions,” and “will,” the Bible gathers them together under one word: heart.
So when God says:
- “Love the Lord your God with all your heart…”
- “The Lord looks at the heart…”
- “Guard your heart, for from it flow the springs of life.”
He is not speaking metaphorically. He is speaking of the deep inner orientation of the whole person.
The Heart as the Seat of Covenant Loyalty
The Bible emphasizes the heart because it is the place of covenant allegiance. The heart can be hard or soft toward God. It can be divided or whole. It can be far from God even while the lips honor Him.
When God promises, “I will give you a new heart” (Ezekiel 36:26), He is not promising a new emotional mood. He is promising a new center of loyalty—a new inner compass that turns toward Him instead of away.
The brain can think about God. The heart, in biblical language, belongs to God—or resists Him.
The Heart as the Hidden Place God Sees
The Bible also speaks of the heart because it is the hidden place that only God fully knows. We see behavior. We hear words. But God sees the motives, the quiet desires, the fears we never say out loud.
“The Lord searches all hearts and understands every intent of the thoughts.” (1 Chronicles 28:9)
“I, the Lord, search the heart…” (Jeremiah 17:10)
The brain is part of how we think, but the Bible’s language of “heart” reaches deeper—to the moral and spiritual core of who we are.
Science Catching Up: Neurocardiology
As I studied more deeply—both Scripture and science—I discovered something astonishing: the heart is far more than a pump. There is a growing field called Neurocardiology, which studies the constant communication between the heart and the brain.
Researchers have found:
- More information travels from the heart to the brain than the other way around.
- The heart communicates with brain regions responsible for perception, thought, and emotion.
- The heart contains an intrinsic nervous system—so complex some call it a “heart brain.”
- About 60–65% of the heart’s cells are neural, not muscular.
- The heart’s electromagnetic field is 40–60 times stronger than the brain’s.
Science is slowly discovering what Scripture has been saying all along: The heart is not just a pump; it is a center.
Stories That Make Us Wonder
As I learned these things, a question came to mind: What happens when someone receives a heart transplant? Do they receive anything from the donor besides the organ?
There are documented cases where recipients report new memories, habits, cravings, fears, and knowledge of people they’ve never met. Science debates these stories, but the testimonies are hard to ignore.
Is the heart carrying more than blood? Is it carrying identity?
Seeing God More Clearly
Learning these things has changed how I read Scripture. When God speaks of the heart—its inclinations, its purity, its devotion—He may be speaking of something far deeper than metaphor.
He created us in His image. He designed the heart to be the conductor of the body—just as He is the conductor of creation.
I used to see creation only at the surface level. When I began looking beneath the surface, into how things were made and how they function, I began to see the fingerprints of God everywhere.
I used to read the Bible the same way—skin deep. But when I began asking Father God to paint the picture more clearly, He began revealing layer after layer. Each new insight shows me how much more there is to learn.
God is awesome.
Closing
Father God, thank You for creating us with such wonder and depth. Thank You for giving us hearts that can know You, respond to You, and be transformed by You. Continue to open our understanding and draw our hearts closer to Yours each day. Amen.
