If you search for the definition of a biblical plumb-line then the reference to the book of Amos will often come up.
“Thus He showed me: Behold, the Lord stood on a wall made with a plumb line, with a plumb line in His hand. And the Lord said to me, “Amos, what do you see?” And I said, “A plumb line.” Then the Lord said: “Behold, I am setting a plumb line In the midst of My people Israel; I will not pass by them anymore.” Amos 7:7-8
Amos pleaded with God to relent his judgment and, in their place, God places a plumb line.
A plumb line is a weight suspended from a string used as a vertical reference line to ensure a structure is centered and straight.
It’s the same with our Christian faith. Jesus who is the truth must be the cornerstone of our faith so that we build on our faith correctly. It’s the Jesus revealed in the bible (not a Jesus of our own imagining), the gospel of the Kingdom that Jesus preached (not a false gospel) and His commandments which we live out.
Deception means we are no longer centred in God’s truth. As followers of Jesus Christ we are to guard against deception. Jesus himself warned us against being deceived particularly in the time before He returns.
It can be easy to get carried away as “charismatic” believers particularly when we belong to a Spirit filled church and it is so important that the Spirit and the Word are in harmony with the right emphasis on both.
The Word of God is our plumb line and any teaching, tongue and interpretation, prophecy or revelation that does not line up with the word of God is false. It may not all be false but test, weigh and discard the false.
The apostle Paul teaches us that the enemy has strategies against us and one is deception. He loves to lead us astray and cause confusion. Any moves of the Spirit need to be discerned to make sure it is the Holy Spirit and not the wrong spirit at work. It is vital to be rooted in God’s Word and filled with the Holy Spirit, the Spirit of Truth.
It’s a really good exercise to ask yourself and write down what you believe about Jesus and what the gospel is. If you had to explain to someone who didn’t know Jesus or had never heard the gospel. What you believe and wrote- Does it pass the plumb line test of God’s word. If it does then we are building on a correct foundation and we are centred but if not we have to dismantle the wrong beliefs and re build. We have to re-centre ourselves in truth.
The belt of truth and our sword is such an essential part of our armour for defence and discernment of truth. Every piece of armour would not fit together or be effective without the belt or sword but we can rush or just neglect that part of our preparation. It takes discipline to read and study the bible, to pray but I encourage you to do it daily and to ask the Holy Spirit to guide you in truth.
The Lord showed me a picture once of a plumb line and the effect of deception. At the start it only takes a tiny bit of deception to lead you away from the truth but the more you follow that wrong idea or false teaching the further and further you eventually end up away from the truth.
If you draw a straight vertical line on a piece of paper you will see what I mean. Draw the plumb-line and then draw another line from the bottom at a slight initial angle away from the line and see how far the line deviates away from the plumb line as you draw.
The thing with deception is how subtle it is. Be on your guard against it. Deception is so close to the truth that we can readily accept it as the truth because it sounds right but when you hold it up to the Word of God you will see the error. Satan knows the Word of God too. He quoted it to Jesus when he tempted him but Jesus knew that satan had twisted it’s true purpose and used the word of God in response correctly.
Jesus sent us the Holy Spirit to help us. The Holy Spirit is the Spirit of Truth who will lead and guide us into all truth. That is why the Word and being filled with the Spirit are so essential to the believer and our walk of faith.
One of the gifts of the Holy Spirit is discernment and I encourage you to pray and ask and seek this gift. When you operate in the gift of discernment you get that sense in your spirit that something is just not right. People refer to gut feelings and it can be like that. I have heard false tongues and just knew in my spirit that it was false and not the Holy Spirit. You hear an interpretation and again it just doesn’t sit right. That is the Holy Spirit helping you to discern the truth. When you talk to other believers they will often have discerned the same.
Have a blessed day.

Now, therefore, you are no longer strangers and foreigners, but fellow citizens with the saints and members of the household of God, having been built on the foundation of the apostles and prophets, Jesus Christ Himself being the chief corner stone, in whom the whole building, being fitted together, grows into a holy temple in the Lord, in whom you also are being built together for a dwelling place of God in the Spirit. Ephesians 2:19-22
7 responses to “Plumb line”
Thanks for this as The old saying goes: ‘sound as a pound’ 👍🙏🏼
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Thanks Ken. Haven’t heard that expression for a while. Great.
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What an excellent post! This is so true, and full of wisdom. Thank you so much for sharing. As you say, we must be led by the spirit within the confines of his word. God bless you today
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Thank you Andy. I really appreciate you reading and commenting.
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It is always a blessing when I do! Reading your posts that is, not my commenting!
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Thanks Andy 😊
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