Why was he told by the "Angel" that he was a fellow prophet?
That is what it is, just a fellow servants of the Lord Jesus Christ.
Angel?
If you are thinking that the
Angel here is the Lord Jesus Christ, think again.
Rev 1:1
The revelation of Jesus Christ, which God gave unto him, to show unto
his servants things which must shortly come to pass; and he sent and signified it by
his angel unto his servant John:
Rev 22:16
I Jesus have sent mine angel to testify unto you these things in the churches. I am the root and the offspring of David, and the bright and morning star.
Five links in the chain of authorship of Rev 1:1
The revelation of Jesus Christ [though the whole bible is so; for all revelation comes through Christ and all centers in him; and especially in these last days God has spoken to us by his Son]:
God, Christ, his angel, his servant John, and the servants in the churches.
But look at the difference between God and Christ and His/Christs angel.
Rev 1:17 And when I saw
him/Christ, I fell at his feet as dead. And he laid his right hand upon me, saying unto me, Fear not;
I am the first and the last: [Rev. 2:8, 22:13]
Rev 1:18 I am he that liveth, and was dead; and, behold, I am alive for evermore, Amen; and have the keys of hell and of death.
Rev 22:12 And, behold, I come quickly; and my reward is with me, to give every man according as his work shall be.
Rev 22:13
I am Alpha and Omega, the beginning and the end, the first and the last.
Christ said,
I am Alpha and Omega and
First and the Last and in
Revelation 1:8 God said, I am Alpha and Omega [See Isaiah 44:6, 48:12]
But to the angels God said,
Heb 1:6 And then, when he presented his honored Son to the world, God said,
Let all the angels of God worship him.
Heb 1:7
God calls his angels messengers swift as the wind, and servants made of flaming fire.
Heb 1:13 And
God never said to an angel, as he did to his Son,
Sit in honor at my right hand
until I humble your enemies,
making them a footstool under your feet.
Heb 1:14 But
angels are only servants [LIKE JOHN]. They are spirits sent from God to care for those who will receive salvation.
BUT TO THE SON GOD SAYS
Heb 1:8
But to his Son he says,
Your throne, O God, endures forever and ever. Your royal power is expressed in righteousness.
Heb 1:9 You love what is right and hate what is wrong.
Therefore God, your God, has anointed you,
pouring out the oil of joy on you more than on anyone else.