You're destroying the faith that Catholics hold so dear, sir. Well, I believe all of what I write,do, and say in the Catholic church, all of the time. I wasn't aware we ever lost it. Of course I believe all of what I write, otherwise I wouldn't write it.
Heresy is always ugly and always to be exposed and refuted.
Of course, since you are a proponent of this heresy, you are not going to view it as such. As for the Gospel being lost, it indeed was officially lost in Rome at the Council of Trent who condemned the true Gospel of Jesus Christ with multiple anathemas, and substituted a false Gospel of works.