Why did it take 400-600 years for the bible to be completed?
You are incorrect on the length of time, it was longer than that, for the Bible was given as a progressive revelation that God wanted to give to foolish man who could not understand the mercy God was going to grant. Even the angels marvel at the boundless mercy of God on sinful mankind.
The Scriptures, as originally written, by inspired writers, are free from error. The words are unique in comparison with any human book. The Bible has special origin, and is immeasurably different from all competitors. All confusion, all apparent contradictions and errors come from mankind, not from the Word of God.
Christ Jesus endorsed the Word of God. (Luke 24:44-45, Matthew 5:17-18).
6Christ Jesus endorsed controversial passages of the Old Testament, as the flood (Matthew 24:37-39), Sodom and Gomorrah (Luke 17:26-32, Matthew 11:21-24), Jonah and the great fish (Matthew 12:40).
Jesus called the Old Testament to be ‘the Word of God’. (Matthew 7:13)
The Bible was written by 44 secretaries of the Author, over a span of 1500 years.
The Bible claims to be authored by God in I Peter 1:10-11, Revelation 19:10, John 5:39, 46, and Luke 24:7.
The Bible is accurate. There were 25 specific prophecies concerning the betrayal, trial, death and burial of Jesus given over a period between 500 to a 1000 years before it occurred... and yet, Jesus fulfilled all of them in 24 hours.
The purpose of the Bible is unique, it is God revealing Himself.
"God, Who at sundry times, and in divers manners, spake in time past unto the fathers by the prophets, hath in these last days spoken unto us by His Son, Whom He hath appointed heir of all things, by Whom also He made the worlds."
God revealed Himself by Jesus, by His deeds and His words. The Bible is the declaration of God about Jesus Who would come, and of His revelation of God’s plan for us would be written
God took time revealing salvation’s plan, for it was a plan that needed to be progressively done, so that all could be offered salvation.
God had said after each of the seven days of the re-creation, that it was ‘good’. But, with only one sin possible, Adam and Eve sinned, and ruined the ‘good’ that had been created.
Before that ‘fall into sin’, it was natural for man to tell the truth. There was only one temptation, and mankind succumbed to it. That sin broke the union between man’s spirit and God, and brought the curse. Eve was deceived, Adam was not deceived but chose to please Eve rather than God. The sins of mankind changed the perfect to the cursed.
Every tear, every drop of sweat, every pain, every sorrow, every death, every heartache, all trace back to that start of sin in this creation. Man’s whole life and nature were tainted by sin. Man’s spirit was darkened.
Ephesians 4:17-18 (KJV)
17 "This I say therefore, and testify in the Lord, that ye henceforth walk not as other Gentiles walk, in the vanity of their mind,
18 Having the understanding darkened, being alienated from the life of God through the ignorance that is in them, because of the blindness of their heart."
This inner darkness in mankind is due to that fall. Due to this inner darkness of the fall into sin, mankind needed a progressive revelation of the merciful and undeserved salvation to be offered by God.
The ‘vanity’ (worthless nature of the thoughts) is due to sin. The alienation of mankind from God, and the resulting ignorance is all due to man’s fall into sin. Man’s soul is debased. Man’s body is therefore diseased and death ridden.
Romans 7:24 (KJV)
24 O wretched man that I am! who shall deliver me from the body of this death?
Many ancient rulers used, as one punishment for a criminal, to carry the dead body of a victim, tied to their back, until the criminal died of the putrid
contagion of the victim. Paul expresses the fact that each of us, carry the putrid nature of sin, and its curse.
The curse on mankind came progressively. It increased as man’s sins continued. This curse, on mankind today, has increased even more. The whole of creation ‘groans and travails in pain’ from this curse. There is a ‘waiting’ for the final elimination of the curse, and till then, we can have redemption of soul, and respite from all of the curses effect. The body still suffers some, waiting for the ‘redemption of the body.’
The redemption process began with the sacrifice God killed to make the coats for Adam and Eve, to cover their naked bodies. The body’s redemption is continuing.
God works from seed to maturity. You may pray for an oak tree, and God gives you an acorn. In spiritual things, it is similar. Pray for a great blessing,
and God may give you someone to whom to witness. If you do, you find the joy of winning a soul to Jesus is the greatest joy. God starts with the small things, and lets you see them grow into greater and greater things. In the parable of the talents, God gave each a talent, but to those who were faithful, the authority and blessing given them was greater. Eternal life is an immediate gift.
John 10:27-28 (KJV)
27 My sheep hear my voice, and I know them, and they follow me:
28 And I give unto them eternal life; and they shall never perish, neither shall any man pluck them out of my hand. Yet, there is more than this still to come.
Philippians 1:6 (KJV)
6 Being confident of this very thing, that He which hath begun a good work in you will perform it until the day of Jesus Christ:
God keeps working on us, progressively bringing us to more and more benefits of our redemption. As God works, sin should have less power on us, as we grow in Jesus. From ‘glory to glory’ we are changed into His image. Until the day, when we meet Jesus in the clouds, we will find progressive redemption from sin, and from the curse.
Galatians 3:13 (KJV)
13 Christ hath redeemed us from the curse of the law, being made a curse for us: for it is written, Cursed is every one that hangeth on a tree:
The Greek word for ‘redeemed’ in that verse, is ‘exagorazo’, meaning ‘to buy from’. He is still purchasing us with His blood. His blood paid for our past sins, His blood is still paying for our sins today. His blood will pay for our sins tomorrow. He is still paying for our healings, for our strength in every day. We still face physical death, if He tarries. Yet, His blood will pay for our resurrection. We can still have physical ailments, we may have to wear glasses, or contacts, we may find wrinkles on our aging faces, we may limp from an arthritic hip, we may need surgery, radiation, we may take Tylenol for headaches. Etc.
If the total curse were removed, even childbirth pains would have not come to pregnant women who are Christians. We are not free from the presence of sin, nor from its curse. Sin is still around us. Christ gave Himself that He ‘Might deliver us from this present evil world.’
Galatians 1:3-4 (KJV)
3 Grace be to you and peace from God the Father, and from our Lord Jesus Christ,
4 Who gave Himself for our sins, that He might deliver us from this present evil world, according to the will of God and our Father:
Jesus gave Himself so He could deliver us from this evil world, but we are not fully delivered from it yet, and when the rapture takes place, we will be then. The curse is not fully removed until we are on the ‘new heaven/new earth, which is at least 1007 years from now (tribulation plus millennium).
Revelation 22:3 (KJV)
3 And there shall be no more curse: but the throne of God and of the Lamb shall be in it; and his servants shall serve him:
The former things of pain, death, sickness, sorrow, etc will pass away, but not till we are on the New Earth.
This is a wonderful and marvelous plan for salvation. The Bible is God’s attempt to get mankind to understand, as best they can, the merciful plan of God. It took many writers, to take inspiration from God, it took the coming of Jesus to complete His plan. He promised to Adam and Eve, that a deliverer from sin would come, and He finally has, and will soon return for those who have accepted His only way of salvation.