Jesus declared the Shema—"Hear, O Israel: Yahweh is our God; Yahweh is one" (Deuteronomy 6:4)—to be the greatest commandment ever given (Mark 12:29). This study examines why this confession stood at the heart of Israel's faith, why God commanded His people to remember it daily, and what it teaches Christians today about the one true God and true worship.
The Greatest Commandment Ever Given — Does Modern Christianity Still Believe It?
Part 1 – The Greatest Commandment Ever Given
"The foremost is, 'Hear, O Israel: The Lord our God, the Lord is one.'"
— Jesus Christ, Mark 12:29
Throughout history, countless books have been written about God.
Churches have debated doctrine for centuries. Councils have formulated creeds. Scholars have produced volumes of theological works, and millions of Christians have inherited beliefs that have been passed down from generation to generation.
Yet before we ask what later traditions taught, there is a far more important question.
What did God Himself reveal about His own identity?
And what did Jesus Christ declare to be the greatest commandment ever given?
Surely, if there is one teaching that every believer should know, understand, and obey above all others, it must be the commandment that both God and His Son placed above every other commandment recorded in Scripture.
Remarkably, many Christians can quote verses about grace, faith, forgiveness, salvation, or eternal life. Yet comparatively few stop to consider the commandment that Jesus Himself described as the foremost of all.
That alone should cause every sincere student of the Bible to pause and ask an important question:
If Jesus called this the greatest commandment, why is it so rarely discussed today?
This study is not an attempt to defend tradition, nor is it an attempt to attack tradition.
Its purpose is much simpler.
It is an invitation to begin where both God and Jesus began.
To allow Scripture to speak for itself.
To compare Scripture with Scripture.
And to examine whether our own beliefs truly rest upon the foundation laid by God Himself.
The Foundation of Israel's Faith
More than three thousand years ago, as the people of Israel prepared to enter the Promised Land, God gave them a command unlike any other.
This was not simply another law among hundreds of commandments.
It became the very foundation of Israel's worship, identity, and relationship with God.
Moses declared:
"Hear, Israel: Yahweh is our God; Yahweh is one."
— Deuteronomy 6:4 (WEB)
These words became known as the Shema, from the opening Hebrew word meaning "Hear" or "Listen."
But this was far more than a sentence to memorise.
It was God's own declaration of who He is.
Immediately afterwards, God commanded His people:
"You shall love Yahweh your God with all your heart, with all your soul, and with all your might. These words, which I command you today, shall be on your heart. You shall teach them diligently to your children, and shall talk of them when you sit in your house, when you walk by the way, when you lie down, and when you rise up."
— Deuteronomy 6:5–7
Notice the extraordinary emphasis.
God did not simply tell His people to remember these words.
He commanded that they should be written upon their hearts.
Parents were instructed to teach them diligently to their children.
Families were to speak about them throughout the day.
They were to remember them when they rose in the morning and before they lay down at night.
Why would God place such extraordinary importance upon one commandment?
The answer becomes clear as we read the rest of the Old Testament.
Again and again Israel abandoned the living God and turned to the false gods of the surrounding nations.
The greatest danger facing God's people was not merely moral failure.
It was forgetting who the true God is.
For this reason, God continually reminded Israel of the most fundamental truth they must never forget.
There is only one true God.
Everything else rested upon that foundation.
Jesus Confirmed Nothing Had Changed
More than a thousand years later, Jesus Christ was asked one of the most important questions ever put to Him.
A scribe came to Him and asked:
"Which commandment is the greatest of all?"
If there had ever been a moment to replace the commandment given through Moses, this would have been it.
If God's revelation concerning Himself had changed, surely Jesus would have explained it here.
But He did not.
Instead, Jesus immediately returned to the very words spoken by God through Moses centuries earlier.
"The foremost is, 'Hear, O Israel: The Lord our God, the Lord is one.'"
— Mark 12:29
Jesus did not introduce a new commandment.
He reaffirmed the old one.
The same commandment that had stood at the centre of Israel's faith remained, according to Jesus Himself, the greatest commandment of all.
The scribe immediately recognised the importance of Jesus' answer and replied:
"Right, Teacher. You have truly said that He is one, and there is no other besides Him."
— Mark 12:32
Notice carefully what happened next.
Jesus did not correct the scribe.
He did not suggest he had misunderstood.
Instead, we read:
"When Jesus saw that he answered wisely, He said to him, 'You are not far from the kingdom of God.'"
— Mark 12:34
This brief conversation deserves careful reflection.
The greatest commandment was not presented as a mystery.
Neither Jesus nor the scribe entered into a complicated philosophical discussion.
The truth was stated plainly.
It was understood clearly.
And the scribe was commended by Jesus for answering wisely.
Why Every Christian Should Know This Commandment
If God commanded Israel to place these words upon their hearts...
If parents were commanded to teach them diligently to their children...
If they were to be spoken morning and evening...
If Jesus Himself declared them to be the foremost of all commandments...
Then should they not also stand at the very centre of Christian faith today?
Every Christian, regardless of denomination or tradition, should know this commandment.
Not merely because it appears in the Old Testament.
But because Jesus Himself declared it to be the greatest commandment of all.
That alone should cause us to ask another important question.
If this is the greatest commandment ever given, why do so few Christians study it in depth today?
Perhaps we have become so familiar with these words that we no longer appreciate their importance.
Or perhaps we have simply assumed we already understand them.
Whatever the reason, the greatest commandment deserves far more than a passing glance.
It deserves our careful attention.
The Journey Begins Here
Throughout this study we will not ask readers to accept conclusions without evidence.
Instead, we will allow Scripture to interpret Scripture.
We will examine the historical setting.
We will consider the words of Moses, the prophets, Jesus, and the apostles.
We will compare passage with passage.
And we will ask whether the beliefs held by Christians today reflect the foundation laid by God Himself.
Only after establishing that foundation will we begin examining later theological questions.
For there can be no better place to begin than where both God and Jesus began.
With the greatest commandment ever given.
In Part 2, we will examine why God commanded Israel to repeat these words continually, why this declaration became the very heart of biblical worship, and why understanding its historical setting is essential before we examine any later doctrinal questions.