In the words of Lewis, “The Gates of hell are barred from the inside.”
Sensing also argues there is salvation outside the Church. I think he’s wrong, since “the Church” is ultimately the company of the saved and therefore it is a tautology to say there is no salvation outside the Church. Is there salvation outside the *visible* Church? Yes. But all who are saved will find, in the end, that they were in some sense united with the Church. And in heaven, that union with the Church will be perfected. It cannot be otherwise, since Christ is the savior of all and the Church is his Body. Salvation is incorporation into Christ.