Very imaginative but God is clearly referring to Abraham as the rock from which they were hewn. He says look to the rock....look to Abraham.
Read it again.
Isaiah 51:1
Hearken to me, ye that follow after righteousness, ye that seek the Lord: look unto the rock whence ye are hewn, and to the hole of the pit whence ye are digged.2 Look unto Abraham your father, and unto Sarah that bare you:
for I called him alone, and blessed him, and increased him.
What is this invitation to look to the rock for? To follow righteousness? To seek the Lord? To be called, blessed, and increased? Can looking to Abraham and Sarah do that for them or to the Lord?
Now read how looking to the Lord as their rock will bring.
3 For the Lord shall comfort Zion: he will comfort all her waste places; and he will make her wilderness like Eden, and her desert like the garden of the Lord; joy and gladness shall be found therein, thanksgiving, and the voice of melody. 4 Hearken unto me, my people; and give ear unto me, O my nation: for a law shall proceed from me, and I will make my judgment to rest for a light of the people.
So He is not talking bout looking to Abraham & Sarah for that, but to the Rock Whom is our God.
Jesus answered him, "Blessed are you [singular in the Greek], Simon Bar-Jona! For flesh and blood has not revealed this to you [singular in the Greek], but my Father who is in heaven. And I tell you [singular in the Greek], you [singular in the Greek] are Peter, ....and on this rock I will build my church, and the powers of death shall not prevail against it. I will give you [singular in the Greek] the keys of the kingdom of heaven, and whatever you [singular in the Greek] bind on earth shall be bound in heaven, and whatever you [singular in the Greek] loose on earth shall be loosed in heaven."
There are other Greek words around that word that hardly places it as ONLY singular in the Greek.
Take the scripture in context because His disciples did not take off when Peter answered Him.
Matthew 16:13 When Jesus came into the coasts of Caesarea Philippi,
he asked his disciples, saying, Whom do men say that I the Son of man am?14 And they said, Some say that thou art John the Baptist: some, Elias; and others, Jeremias, or one of the prophets.
15 He saith unto them, But whom say ye that I am?16 And Simon Peter answered and said, Thou art the Christ, the Son of the living God.17 And Jesus answered and said unto him, Blessed art thou, Simon Barjona: for flesh and blood hath not revealed it unto thee, but my Father which is in heaven.18 And I say also unto thee, That thou art Peter, and
upon this rock I will build my church; and the gates of hell shall not prevail against it.19 And I will give unto thee the keys of the kingdom of heaven: and whatsoever thou shalt bind on earth shall be bound in heaven: and whatsoever thou shalt loose on earth shall be loosed in heaven.
20 Then charged he his disciples that they should tell no man that he was Jesus the Christ.
So His disciples were there in that place when Jesus was talking to them all. He was talking about Peter to Peter & to His disciples, but when He began talking about the rock that the church will be built upon that the gates of hades shall not prevail against; that rock was Christ.
And they weren't in any room. Didn't you read my post? They were at Caesarea Philippi where there is a massive cliff face (rock) on which were built temples to various pagan Gods. Then Jesus says to Kephas (Rock) "You are Rock and upon this rock I will build my church." Geddit!??
He said "That
thou art Peter, and
upon this rock I will build my church; and the gates of hell shall not prevail against it."
Peter & the rock that the church will be built upon is not the same thing. Jesus testified that He will build His church. Not Peter. If Peter was really the rock, don't you think He would say singular YOU will build Your church and the gates of hell shall not prevail against?
You can know that you are reading Him wrong when you see other scripture, testifying from Who the church is built from.
Luke 20:17And he beheld them, and said, What is this then that is written,
The stone which the builders rejected, the same is become the head of the corner?
Even Peter said so..
1 Peter 2:
7Unto you therefore which believe he is precious: but unto them which be disobedient,
the stone which the builders disallowed, the same is made the head of the corner,
1 Corinthians 3:11
For other foundation can no man lay than that is laid, which is Jesus Christ.
Ephesians 2:19 Now therefore ye are no more strangers and foreigners, but fellowcitizens with the saints, and of the household of God. 20 And are built upon the foundation of the apostles and prophets, Jesus Christ himself being the chief corner stone; 21 In whom all the building fitly framed together groweth unto an holy temple in the Lord:
I do not see Paul speaking of Peter as being the chief corner stone from which the church is built from.
I reckon you have to be there but He was speaking to His disciples when He began and yes, He may have announced Simon's new name of Peter to Simon and to His disciples, but He was telling then that upon the revelation that Peter had given of Him being God, yeah.. that rock... He wll build His church; not Peter.. not Peter's church.. but He will do it as He is the chief cornerstone as well as the rock of our salvation.