It's not saying Repent then believe.
Mat 3:1-2
In those days came John the Baptist,
preaching in the wilderness of Judaea,
And saying,
"Be ye repenting,
for (the reason that)
the Kingdom of Heaven
is at hand."
The Prize is announced, the Good News of its Presence, here and now, upon this earth...
The Prize that is locked away from man to this very day and hour...
Locked away from even its last and greatest Prophet, John the Baptizer of Christ...
For John Himself went to hell, and never entered it on this earth...
But he proclaimed the REAL Good News, that each of you without exception...
Each of you has the Key to attain entry into this Kingdom...
Christ only wants one thing from you and He will bring you into His Kingdom...
And that one thing is your repentance from this world...
That you turn from the world and from your self...
And that you turn to God crying out:
"Blessed is He that Cometh in the Name of the Lord!"
Then John was beheaded by Herod in prison...
For the sake of dirty dancing by his wife's daughter...
And after this, his mission was taken up by Christ Himself:
Matt 4:17
From that time Jesus began proclaiming and saying,
"Be ye repenting,
for the Kingdom of Heaven is at hand."
And Mark confirms:
Mar 1:14-15
Now after that John was put in prison,
Jesus came into Galilee,
preaching the Gospel of the Kingdom of God,
And saying,
"The time is fulfilled,
and the Kingdom of God is at hand:
Be ye repenting
and believing IN
the Gospel."
So this last affirms that it is the pewsence of the Kingdom of God that IS the Gospel Good News...
And because it has drawn nigh, there is something you can do about it...
You can be repenting and believing in this Gospel of the nearness of the Kingdom of God...
Repentance is first, then believing is second...
Even if you do not believe in the presence of the Kingdom of God, you can be repenting...
And if you live a life of repenting, you will come to believing...
You can repent without believing the Gospel... For years and years...
Believing the Gospel without repenting is an oxymoron...
The Gospel is Repentance unto the attaining of the Kingdom of God on earth...
The word order is not accidental...
It did not say: "Believe and repent in the Gospel"
It does say: "Be ye repenting, and believe the Gospel..."
That Kingdom is here and now...
The key to its doors is repentance...
That key is in your pocket...
Arsenios