Your question touches what is perhaps one of the central affirmations of the New Testament: Jesus Christ is not merely another subject in theology; He is the One through whom all true knowledge of God reaches its fulfillment. The Old Testament is not discarded by Christ—it is illuminated by Him.
The apostles never treated Christ as an appendix to previous revelation. They proclaimed Him as the very goal toward which all revelation had been moving.
📖 Christ Is the Full Revelation of God
The clearest statement comes from Jesus Himself:
“No one has seen God at any time. The only begotten Son, who is in the bosom of the Father, He has declared Him.”
— John 1:18 (NKJV)
The Greek word translated “declared” (ἐξηγήσατο, exēgēsato) is where we derive the word exegesis. Christ is, so to speak, the Father’s own interpretation of Himself.
Likewise:
“He who has seen Me has seen the Father.”
— John 14:9 (NKJV)
Jesus does not merely teach about God. He reveals God because He is God incarnate.
Paul echoes this truth:
“For it is the God who commanded light to shine out of darkness, who has shone in our hearts to give the light of the knowledge of the glory of God in the face of Jesus Christ.”
— 2 Corinthians 4:6 (NKJV)
Notice where the knowledge of God’s glory is found:
In the face of Jesus Christ.
Not apart from Him.
Not alongside Him.
In Him.
📖 The Old Testament Was Always Pointing Forward
Jesus repeatedly taught that the Scriptures ultimately testify about Him.
To the religious leaders He said:
“You search the Scriptures, for in them you think you have eternal life; and these are they which testify of Me.”
— John 5:39 (NKJV)
The tragedy was not that they lacked Scripture.
The tragedy was that they possessed Scripture without recognizing its Subject.
They knew the text.
They missed the Person.
After His resurrection, Jesus explained the same truth to the disciples on the road to Emmaus:
“And beginning at Moses and all the Prophets, He expounded to them in all the Scriptures the things concerning Himself.”
— Luke 24:27 (NKJV)
And later:
“These are the words which I spoke to you… that all things must be fulfilled which were written in the Law of Moses and the Prophets and the Psalms concerning Me.”
— Luke 24:44 (NKJV)
Notice the scope:
- Moses
- The Prophets
- The Psalms
In other words, the entire Hebrew Bible.
📖 Paul’s Own Life Is the Greatest Example
Your observation about Paul is exactly right.
Paul never said that the Law was worthless.
He said something much deeper.
Everything he once regarded as grounds for confidence became insignificant when compared with knowing Christ.
“But what things were gain to me, these I have counted loss for Christ. Yet indeed I also count all things loss for the excellence of the knowledge of Christ Jesus my Lord…”
— Philippians 3:7–8 (NKJV)
Notice the comparison.
He is not contrasting bad things with good things.
He is contrasting good things with the infinitely better thing.
Paul possessed:
- circumcision
- tribe of Benjamin
- Hebrew heritage
- Pharisaic education
- zeal
- blamelessness according to the Law
These were not evil.
But they were incomplete apart from Christ.
He discovered that all those privileges were signposts.
Christ was the destination.
📖 Knowledge Can Exist Without Sight
Paul describes Israel’s condition this way:
“For I bear them witness that they have a zeal for God, but not according to knowledge.”
— Romans 10:2 (NKJV)
How could people devoted to the Scriptures lack knowledge?
Because biblical knowledge is not merely information.
It is truth rightly understood in the light of God’s revelation.
Paul explains elsewhere:
“But their minds were blinded. For until this day the same veil remains unlifted in the reading of the Old Testament, because the veil is taken away in Christ.”
— 2 Corinthians 3:14 (NKJV)
Notice something remarkable.
The veil is not over the Old Testament.
The veil is over the reader.
The text did not need changing.
The heart needed unveiling.
And that unveiling happens in Christ.
📖 The Shadow and the Reality
The writer of Hebrews repeatedly teaches this principle.
The Law contained:
- sacrifices
- priesthood
- tabernacle
- feasts
- covenant ceremonies
All of these were real.
But they were provisional.
Hebrews says:
“For the law, having a shadow of the good things to come, and not the very image of the things…”
— Hebrews 10:1 (NKJV)
A shadow is valuable.
It tells you someone is approaching.
But once the person arrives, you no longer study the shadow to know him.
You look at the person.
Likewise Paul writes:
“So let no one judge you… regarding a festival or a new moon or sabbaths, which are a shadow of things to come, but the substance is of Christ.”
— Colossians 2:16–17 (NKJV)
Christ is the substance.
Everything before Him anticipated Him.
📖 Is Old Testament Knowledge Without Christ “In Vain”?
This deserves a careful distinction.
The Scriptures themselves are never in vain.
David delighted in them.
The prophets proclaimed them.
The Law is “holy and just and good” (Romans 7:12).
The problem is not the Old Testament.
The problem is reading it while refusing the One to whom it points.
Jesus told the Jewish leaders:
“If you believed Moses, you would believe Me; for he wrote about Me.”
— John 5:46 (NKJV)
That is a striking statement.
One can know Moses extensively and yet fail to believe Moses if one rejects Christ.
Why?
Because Moses’ ultimate testimony was not about Moses.
It was about Christ.
📖 The Knowledge That Saves Is Personal
There is another beautiful distinction in Scripture.
The Bible speaks not merely of knowing about God but of knowing Him.
Jesus says:
“And this is eternal life, that they may know You, the only true God, and Jesus Christ whom You have sent.”
— John 17:3 (NKJV)
Notice that eternal life is not defined primarily as endless existence.
It is defined as knowing the Father and the Son.
This is relational knowledge.
The kind Paul longed for when he wrote:
“That I may know Him and the power of His resurrection, and the fellowship of His sufferings…”
— Philippians 3:10 (NKJV)
Paul had known Scripture for decades.
But after meeting Christ, he realized that all his previous learning had been preparation for knowing a Person.
😊 A Beautiful Irony
One of the most beautiful ironies in Scripture is that the men who knew the Old Testament best were often the ones who struggled most to recognize the Messiah standing before them.
Meanwhile fishermen, tax collectors, former sinners, and Gentiles came to know the God of Abraham because they came to know Jesus.
This is why the New Testament consistently presents Christ not simply as another revelation from God but as the key that unlocks every previous revelation.
As Paul writes:
“For in Him dwells all the fullness of the Godhead bodily.”
— Colossians 2:9 (NKJV)
And again:
“For it pleased the Father that in Him all the fullness should dwell.”
— Colossians 1:19 (NKJV)
So the fullest knowledge of God is not reached by accumulating more facts about Him, but by beholding His self-revelation in His Son. Every promise, sacrifice, priest, king, prophet, covenant, and act of redemption finds its coherence and completion in Christ. Apart from Him, one may possess many true pieces of revelation, yet miss the living center that gives every piece its meaning. As Jesus Himself said to the disciples after His resurrection, “Then He opened their understanding, that they might comprehend the Scriptures” (Luke 24:45). It was not new Scriptures they needed—it was opened eyes. And that remains true today.