Why are there 4 gospels?
In taking up the study of any ones of the Gospels,
it is always well to look at it in relation to the other
three. We have four gospels in the New Testament,
and the questions are often asked, “Why are there four?”
and “Would it not have been just as easy to have given
us one continuous biography of Christ rather than four
accounts, all by different writers?”
This was not God’s desire.
By giving us four different records written by four
different men, we have a stronger foundation for our
faith in the birth, life, death and resurrection of our
Lord Jesus Christ.
We are told in Matt 18:16 “In the mouth of two or
three witnesses every word may be established” God
has given us this testimony not only from three but
four witnesses; each one written by the guidance of the
Holy Spirit.
(H. A. Ironside Addresses on the Gospel of Luke)