It is reported that when Muhammad (pbuh) was
around the age of forty years, he used to go to a cave named "Hira",
with some rations and used to spend his time meditating and worshipping his
Lord, at the age of forty during the same process of meditation an angle
"Gabriel" appeared to him revealing the first verse of the Holy Book
of Islam.
But as described in Muslim history and Holy Books, it was not
only the meditation which rose him to prophet hood, it was his devotion and
love for his Lord and he had been chosen to become a prophet even before his
birth as in Islam prophet hood is a rank which no one can attain by force or
with his own efforts rather than it is Allah’s choice whomsoever He chooses.