Why Rightly Dividing the Word Changes Everything
“He has made us competent as ministers of a new covenant, not of the letter but of the Spirit; for the letter kills, but the Spirit gives life.” (2 Corinthians 3:6)
One of the most common questions I hear is this:
“I’m lost when it comes to the Old Testament and the New Testament. How do I know which one to follow?”
That is a very relevant question and it opened one of the most important conversations of my faith journey. Because so much confusion, guilt, fear, and striving in the Christian walk comes from not understanding the difference between the Old and the New Covenant.
Understanding all this changed how I saw God completely. I stopped trying to “pay for” sins Jesus had already dealt with. I stopped living in guilt over what had been forgiven. I stopped trying to reverse what Jesus had already reset. I learned to rest.
God has not changed. But the way He relates to humanity has.
The Promise of a New Covenant
God Himself promised that there would be a shift.
“Behold, the days are coming, says the Lord, when I will make a new covenant with the house of Israel and with the house of Judah, not according to the covenant that I made with their fathers in the day that I took them by the hand to lead them out of the land of Egypt, My covenant which they broke, though I was a husband to them, says the Lord. But this is the covenant that I will make with the house of Israel after those days, says the Lord: I will put My law in their minds, and write it on their hearts; and I will be their God, and they shall be My people. No more shall every man teach his neighbor, and every man his brother, saying, ‘Know the Lord,’ for they all shall know Me, from the least of them to the greatest of them, says the Lord. For I will forgive their iniquity, and their sin I will remember no more.” (Jeremiah 31:31–34)
Under the Old Covenant:
- The law was external
- Written on stone tablets
- Constantly reminding people of failure and exposing sin.
Under the New Covenant:
- God writes His law on our hearts through His Spirit
- Marked by forgiveness, not condemnation
- Constantly enabling us to live righteously when we yield to His Spirit and redeeming the sinner.
“I will give you a new heart and put a new spirit within you; I will take the heart of stone out of your flesh and give you a heart of flesh. I will put My Spirit within you and cause you to walk in My statutes, and you will keep My judgments and do them.” (Ezekiel 36:26–27)
This is the heart of the New Covenant. God doesn’t control us from the outside, He transforms us from the inside. Righteousness becomes natural, not forced. This wasn’t humanity’s idea. It was God’s solution to humanity’s inability to keep the law.
Jesus: The Mediator of the New Covenant
“But in fact the ministry Jesus has received is as superior to theirs as the covenant of which He is mediator is superior to the old one.” (Hebrews 8:6–13)
The Old Covenant required continual sacrifices, a constant reminder of sin.
The New Covenant rests on one perfect sacrifice, Jesus Christ.
“For by one sacrifice He has made perfect forever those who are being made holy.” (Hebrews 10:14)
This means God no longer relates to us based on how well we perform. He relates to us based on what Christ has already done.
“God, who at various times and in various ways spoke in time past to the fathers by the prophets, has in these last days spoken to us by His Son, whom He has appointed heir of all things, through whom also He made the worlds;” (Hebrews 1:1-2)
In the old covenant God used to speak through prophets, not everyone could hear God or experience Him but in the new covenant, we all have access to Him as He constantly speaks to us through Christ in us.
“For we do not have a High Priest who cannot sympathize with our weaknesses, but was in all points tempted as we are, yet without sin. Let us therefore come boldly to the throne of grace, that we may obtain mercy and find grace to help in time of need.” (Hebrews 4:15–16)
God was always merciful, but access was limited. The veil is torn, access is open and relationship is restored. We don’t approach God as distant subjects anymore but we come as children.
Grace vs Law, What Actually Changed
“For the law was given through Moses; grace and truth came through Jesus Christ.” (John 1:17)
“There is now no condemnation for those who are in Christ Jesus.” (Romans 8:1)
The law under the Old Covenant revealed:
- God’s holiness
- Humanity’s inability
- Breaking the law brought judgment
Grace under the New Covenant reveals:
- God’s mercy
- God’s provision for our inability
- Christ fulfilled the law on our behalf
- We walk by faith
- We live by relationship
- We grow by grace
The law demanded righteousness. Grace gives righteousness. God now deals with us through Christ’s righteousness, not our performance. This one truth alone has set so many people free.
“The law was our guardian until Christ came… now that faith has come, we are no longer under a guardian.” (Galatians 3:23–25)
The law was never the destination.
It was a signpost pointing to Christ. Now that we are in Christ:
- We walk by faith
- We live by relationship
- We grow by grace
Watchout for our next blog on Christ and The Law where we dive deeper into the subject.
From the Ministry of Death to the Ministry of the Spirit
“Not that we are sufficient of ourselves to think of anything as being from ourselves, but our sufficiency is from God, who also made us sufficient as ministers of the new covenant, not of the letter but of the Spirit; for the letter kills, but the Spirit gives life. But if the ministry of death, written and engraved on stones, was glorious, so that the children of Israel could not look steadily at the face of Moses because of the glory of his countenance, which glory was passing away, how will the ministry of the Spirit not be more glorious? For if the ministry of condemnation had glory, the ministry of righteousness exceeds much more in glory.” (2 Corinthians 3:5–9)
God’s holiness didn’t change. His love did not change. His mercy did not change. His method did. The law exposed sin but gave no power to overcome it. The Spirit transforms us from within. Now, obedience flows from life, not fear. The New Covenant invites us into relationship, not rule-keeping. We obey, not to earn love but because we are loved. This was never about lowering God’s standards. It was about changing the source of obedience.
The Heart of the New Covenant
“Where the Spirit of the Lord is, there is freedom.” (2 Corinthians 3:17)
- Grace over law – mercy, not merit
- Spirit over flesh – empowerment, not pressure
- Love over obligation – relationship, not ritual
- Intimacy over distance – access, not separation
- It’s not about doing more – it’s about being transformed.
- It’s not about trying harder – it’s about trusting deeper.
- It’s not about rules – it’s about relationship.
- We are no longer slaves to fear or condemnation – we are sons and daughters of grace.
A Prayer from my Heart
Thank You for the New Covenant sealed in the blood of Jesus.
Thank You that Your law is written on my heart, not on stone.
Help me to walk in the freedom of grace, not the bondage of guilt.
Teach me to live from love, not fear from relationship, not ritual.
Thank you for enabling me to live a life of obedience and righteousness because of what You have done for me.
In Jesus’ name,
Amen. ❤️
If this post has helped bring clarity, or if you’re realising that you’ve been living under pressure where God intended peace, we would love to walk with you. And if you’re learning to read the Word through grace, rightly divided, and rooted in Christ, you are welcome here.
Last modified: 21/03/2026