Hi! 'ChristInYou'
It's rather remarkable that you referenced the parable of the Good Shepherd. Especially after the earlier Thread titled 'Biblical View of Speaking Life'.
At first glance, some would believe that a child could understand the parable of the Good Shepherd. Perhaps, this might be why it seems to have become a Sunday school favorite. Yet verse 6 says: "This parable spake Jesus unto them: but they understood not what things they were which he spake unto them".
The listeners had not been taught to think spiritually. This shouldn't surprise us. They didn't even even understand the meaning of their own worship, for it too was a symbol of the heavenly reality, (Heb 9:9).
The parable of the Sheep Fold reveals to us the Kingdom of God, (the light side of the Kingdom of heaven). The door giving entrance to it stands for repentance and forgiveness of sins through our Lord's suffering and death. This is why Jesus said, "I am the door". The way which Jesus opened is the only lawful way into the Kingdom of God.
John the Baptist was the first servant of God alluding to this truth because his baptism was a baptism of repentance and forgiveness of sins. Accordingly, he spoke to the people about the "Lamb of God who takes away the sin of the world".
A new era was ushered in when John announced: "Repent, for the Kingdom of heaven is at hand" (Mark 1:4; Matt 3:2 & John 1:29). By his preaching, John drew the attention of the crowds away from the visible sacrifices in the temple. He showed them the spiritual reality and not the temporary shadow of ceremonies and temple traditions. He was the preparer of the way, whose word put the axe at the root of the tree of the Old Covenant.
While the message of John made him the doorkeeper who showed the sheep the right entrance into the Kingdom of God, Jesus "made purification for sins" and so opened the door to the sheepfold.
John's task was "to turn the hearts of the fathers to the children, and the disobedient to the wisdom of the just, to make ready for the Lord a people prepared", (Luke 1:17). So, it speaks about there being a preparation. The message of John created a new disposition or will to obey, and it caused man to be fit to enter into the Kingdom of God.
However, the message of Jesus not only caused the disobedient to become willing but also gave them the ability to obey and to enter because they were set free from the powers of darkness which had previously obstructed their entering. This is why Jesus declared: "If it is by the Spirit of God that I cast out demons, then the Kingdom of God has come upon you", (Matt 12:28).
In this way the "lost sheep of the house of Israel", (the disobedient), were able to enter. This put them in a situation similar to the little children whose parents took them to Jesus and about whom He said: "For to such (consecrated and protected children) belongs the Kingdom of heaven", (Matt 19:14).
Following the resurrection of Jesus, everything became reality, not only for the people of Israel but also for the other nations. Paul's commission was for the Gentiles, "To whom I send you to open their eyes, that they may turn from darkness to light and from the power of Satan to God, that they may receive forgiveness of sins and a place among those who are sanctified by faith in Me", (Acts 26:17-18).
This fulfilled Jesus' words: "And I have other sheep, that are not of this fold; I must bring them also, and they will heed my voice. So there shall be one flock, one shepherd", (John 10:16).
In our days there are still multitudes of sincere genuine Christians who insist to only follow after the teachings of John the Baptist. They preach repentance and forgiveness of sins through Jesus Christ; but this is where they stop.
Yet, make no mistake. Even those who only accept the message of John enter into the Kingdom of God. This is because the perfect sacrifice has been made and forgiveness of sins has been accepted by them in faith.
On the other hand, while repentance involves a decided TURNING AWAY from the powers of darkness, it is ineffectual to SET FREE the penitent from the powers of darkness. This is why a walk in the Kingdom of God is often discovered to be near impossible for so many of our Christian brothers and sisters.
Thankfully, if a Christian finds himself in the circumstance of needing to be released from the grip of sin, the teaching of Jesus abundantly provides, even if John's does not.
The parable of the Good Shepherd mentions the voice of the shepherd Himself. So there is a voice, or doctrine, of Jesus which is "much more excellent"'. Even though it fits in suitably with what John taught, it is nonetheless a salvation which was for the very first time declared by the Lord and of which "God also bearing [them] witness, both with signs and wonders, and with divers miracles, and gifts of the Holy Ghost, according to his own will", (Heb 2:3-4).
So, we have a a brotherhood with those who only know the teachings of John the Baptist; those who are acquainted with the forgiveness of sins because it leads these sheep into the same fold. But at the same time, there is a gospel of the Kingdom which distinguishes or shows a separation between the sheep in that one confined room.
That is the reason why Paul asked the disciples of John at Ephesus: "Did you receive the Holy Spirit when you believed?" The apostle added: "John baptized with the baptism of repentance, telling the people to believe in the one who was to come after him, that is Jesus. On hearing this, they were baptized in the name of the Lord Jesus. And when Paul had laid his hands upon them, the Holy Spirit came on them; and they spoke with tongues and prophesied", (Acts 19:1-7).
Have you noticed, 'ChristInYou'? In some other parables of the Kingdom of God too we can note this same distinguishing. For instance, the parable speaking about the city of God and its temple. The "city", New Jerusalem, are those who are washed in the blood of the Lamb of God. But those who have received the baptism with the Holy Spirit and function in the heavenly places are the "temple", which forms the dwelling place of God in the spiritual world.
So it is that we know that John's teachings led the erring sheep of the house of Israel back to the sheepfold. There they form the remnant chosen by grace. In the sheepfold there now is a spiritual Israel from among Jews and Gentiles. But in the midst of these tribes there is the "royal priesthood", (1Peter 2:9). They are anointed with the Holy Spirit. They are the sealed out of every tribe of the sons of Israel, (Rev 7:4). These are the Good Shepherd's "own" sheep.
Jesus came to the sheepfold, "to lead many sons to glory", for the Kingdom of God reaches beyond the walls of the sheepfold, meaning to say: beyond the knowledge that sins are forgiven and that one has become a child of God.
The Good Shepherd brings His "own sheep" out of the fold, and then He goes before them, and the sheep follow Him, for they know His voice, (John 10:4).
"Knowing His voice" means accepting His words and His ways of thinking. Following Him means to use His methods, do the things which He did, and express His doctrine in acts.
"Going in" means entering into the rest of the sheepfold through the forgiveness of sins and the knowledge of being a child of God, and entering the rest of the perfect sacrifice of Calvary,(Heb 4). The Lord spoke about this invitation saying, "Come that they may have life, and have it abundantly", (John 10:10).
When the Lord added that His sheep "go in and out and find pasture", He was indicating that His sheep are active in the heavenly places. After all, this is where His sheep receive their spiritual food and drink the water of life. It is in the unseen kingdom where they are filled with the Holy Spirit and are kept safe by the Lord from the enemy, the thief and robber who always desires to kill and destroy them.
While all the sheep in the fold have life, only those who follow the Good Shepherd have it abundantly. As Revelation says, "for the Lamb in the midst of the throne will be their shepherd, and He will guide them to springs of living water; and God will wipe away every tear from their eyes", (7:14).