I have a few books on Evangelism. A number of them have the same statistic in them. I will put it up later when I find it (If I remember). But from what I remember, the stat was done by the Campus Crusade organisation (Bill Bright).
I have asked many believers about the Gospel and many, even pastors have not been able to say it. They have said things like, "It's the bible" or "It's Jesus". I do believe that many of these people do know what the Gospel is, but they have not prepared a defence. So, they have not thought through how to say it. However, I do find it strange that with something so important, something of such value, that they have not pondered on it regularly. We were dead and now we are alive. That is the most amazing thing ever and it should be at the forefront of our thoughts.
But this is why the Gospel is not told. Many who believe do not know how to articulate it confidently. They are not being equipped to say the Gospel to the lost. If they are not trained, then when facing a non-believer, it will be scary. It's like a soldier going into battle but he has not been taught how to use his weapon. He will want to run from the battle.
And even now have many within christendom changed the gospel into another gospel which is no gospel at all .
Lets look a bit closer at the we were dead and now are alive part again .
We were dead in What . trangressions. now we are , OR SHOULD BE , dead to sin and alive unto GOD unto righteousness .
The truth is that a large and ever growing part of Christendom has altered this in order to gain seats and numbers .
They have created another jesus in the image of man that will promise salvation but also support their sinful hearts desire .
That one DONT save and it aint JESUS the CHRIST . As we should know that satan can quoate verbatum scrips .
HE can say GOD is love all right but his version of love , Watch out it comes not of GOD at all .
Many are still dead in sin as they follow a ministir of sin and even call it jesus .
So then she who liveth is DEAD while she liveth . IN SIN .
Dead to SIN , alive unto righteousness .
GOD desired a people to worship him in SPIRIT and TRUTH . not in sin , IN SPIRIT and IN TRUTH .
JESUS was crucified and took our sins in his flesh
that we being MADE DEAD TO SIN should live unto RIGHETOUSNESS .
Shall we sin because we are not under the law
GOD forbid , dont you know to whom you yield yourselves servants to obey , HIS servants you are
whether of sin unto death or obediance unto righteousness .
The death burial and ressurection of JESUS , AINT getting properly taught at all in many places now .
As i wrote above and afore , many have run to a flesh serving jesus who promises them salvation .
ONLY JESUS dont serve the flesh , IS no ministir of sin . So its another gospel , another love ,another jesus they ran too .
AND IT cannot save them .