Seems every topic comes down to this on this forum. Among "believers" there are those who know the Bible is all we have today for the learning of God's Word, then there are those who believe they following something more, words of Christ/God that is in their hearts.
2 Cor 3:1 Do we begin again to commend ourselves? or need we, as some others , epistles of commendation to you, or letters of commendation from you?
2 Ye are our epistle written in our hearts, known and read of all men:
3 Forasmuch as ye are manifestly declared to be the epistle of Christ ministered by us, written not with ink, but with the Spirit of the living God; not in tables of stone, but in fleshy tables of the heart.
4 And such trust have we through Christ to God-ward:
5 Not that we are sufficient of ourselves to think any thing as of ourselves; but our sufficiency is of God;
6 Who also hath made us able ministers of the new testament; not of the letter, but of the spirit: for the letter killeth, but the spirit giveth life.
7 But if the ministration of death, written and engraven in stones, was glorious, so that the children of Israel could not stedfastly behold the face of Moses for the glory of his countenance; which glory was to be done away:
8 How shall not the ministration of the spirit be rather glorious?
Everyone should be able to see that ....
"the letter", "tablets of stone", and "ministration of death" is the OT being contrasted with the NT being "the spirit" and what the people (church) believed (what came from their hearts). Isn't it strange ink was used to tell them!
The Words of Christ and the Spirit are the same thing a lot of times because in parallel passages they are used interchangeably.
Example;
Col 3:16 Let the word of Christ dwell in you richly in all wisdom; teaching and admonishing one another in psalms and hymns and spiritual songs, singing with grace in your hearts to the Lord.
Eph 5:18 And be not drunk with wine, wherein is excess; but be filled with the Spirit;
19 Speaking to yourselves in psalms and hymns and spiritual songs, singing and making melody in your heart to the Lord;
Hence being filled with the Spirit is the same thing as letting the word of Christ dwell in you.
Or we can just take Jesus's word can't we?
John 6:63 It is the spirit that quickeneth; the flesh profiteth nothing: the words that I speak unto you, they are spirit, and they are life.
Now if the words he spoke unto his disciples are spirit, and are what gives life, where do we go to find those words? Yet people today still rely on what they think their flesh is telling them even though that flesh profits nothing. We can find in the Bible the words he spoke to his disciples. Let their words dwell in you and the Spirit and Christ will be dwelling in you. Let God be true and all others be lairs.
Yes the prophecy of God's law was fulfilled and written into the hearts and minds of men, Paul confirms it in 2 Cor. It was the church, they way they acted as a group, spreading the good news and doing good deeds they were a letter in the hearts and minds of the Apostles.
John 17: 20 Neither pray I for these alone, but for them also which shall believe on me through their word;
Jesus prayed for us that believe on his disciples word because they spread his word. Yet some here say "Jesus is in my heart" or "in my mind" while totally mocking those that Jesus actually prayed for. If the Bible (the new testament message [The Gospel]) is in your heart and mind, then Christ and the Spirit are to.