Fr. Dwight  posits a schism that exists only in his own mind. All Catholics believe

Jesus Christ is the Virgin born Son of God and that as the second person of the Holy and undivided Trinity established his church on earth supernaturally filled with the Holy Spirit ..., a divinely appointed institution established for the eternal salvation of souls...established by God’s Son Jesus Christ our Lord for the defeat of Satan, the salvation of souls and the redemption of the world through the supernatural graces empowered by the sacrificial death  of Jesus Christ on the cross.

We also all believe that the church will exist as God's instrument and the bride of Christ and the people of God until the end of time, but I think the differences may center around the question of whether "stand firm" is the only, or even best,  way to describe what the church has done, is doing and will do during its existence. 

 We also all believe that it is a merciful God, not the church,  who saves souls.