Please tell me what is so compelling about a man who claims to have heard an angel speak to him while he was alone in a cave. Why is everybody supposed to just take his word for it? Even if he did hear an angel, there are spirits of truth and deception, that is if you believe in the Bible. Why are we to believe it was an angel of good as opposed to evil?
I'm not a Muslim but in my faith we accept that the angel or Gabriel mentioned as being a symbol of revelation to Prophet Muhammad is like the dove symbolizing the Holy Spirit when Christ was baptized by John the Baptist:
"...that same Spirit which, in the Zoroastrian, the Mosaic, the Christian, and Muhammadan Dispensations, had been respectively symbolized by the "Sacred Fire," the "Burning Bush," the "Dove," and the "Angel Gabriel."
(Shoghi Effendi, Messages to America, p. 100)
Waraqa a Christian and relative of Khadijih suggests this in Hadith:
Khadija then accompanied him to her cousin
Waraqa bin Naufal bin Asad bin 'Abdul 'Uzza,
who, during the PreIslamic Period became a
Christian and used to write the writing with
Hebrew letters. He would write from the Gospel
in Hebrew as much as Allah wished him to write.
He was an old man and had lost his eyesight.
Khadija said to Waraqa, "Listen to the story of
your nephew, O my cousin!" Waraqa asked, "O
my nephew! What have you seen?"
Allah's Apostle described whatever he had seen.
Waraqa said,
"This is the same one who keeps
the secrets (angel Gabriel) whom Allah had sent
to Moses. I wish I were young and could live up
to the time when your people would turn you
out."
Allah's Apostle asked, "Will they drive me
out?"
Waraqa replied in the affirmative and said,
"Anyone (man) who came with something similar
to what you have brought was treated with
hostility; and if I should remain alive till the day
when you will be turned out then I would support
you strongly."
But after a few days Waraqa died
and the Divine Inspiration was also paused for a
while.
(Hadith, Bukhari Vol 1)
Surih 10:94:
"And if thou art in doubt as to what we have sent down to thee, inquire at those who have read the Scriptures before thee."