It is* Jesus Christ *who is the Way the Truth and the Life. It is in him and by him that one is saved.
And no one is saved except by him. And it will also be in relation with his body the Church.
“There is salvation in no one else, for there is no other name under heaven given among men by which we must be saved” (Acts 4:12)
But
he can save someone who does not
explicitly know him…or his Church.
As the Document from Vatican II Lumen Gentium states:
Those also can attain to salvation who through no fault of their own do not know the Gospel of Christ or His Church, yet sincerely seek God and moved by grace strive by their deeds to do His will as it is known to them through the dictates of conscience.
It is not their deeds though that save them…it is Jesus… but he does not hold them accountable for what is not their fault… and to this I would add that some do not know him or his Church due to faulty presentations etc of them…
and as the Catechism notes:
*848 "Although in ways known to himself God can lead those who, through no fault of their own, are ignorant of the Gospel, to that faith without which it is impossible to please him, the Church still has the obligation and also the sacred right to evangelize all men."338 *
a to your other questions…
If a person really truly and knowingly rejects Christ he rejects God and salvation…but grace can still reach him before he dies…and thus Jesus can save him…
and again God judges him according to his lights…for that person may have had a bad presentation of Christ and his Gospel or there can be other things that interfered that were not his fault etc… so again we can have hope and we know that Jesus truly knows each of us…
As to the terrible person who believes and is Catholic…if he commits a mortal sin and dies in that state without being reconciled with God…then he has given up his salvation…God loves us and seeks us etc…gives us grace…but he will not force a person to be with him…
as to the scapular…yes anyone may wear a scapular … and Mary loves us all…and seeks to help us all find and follow Christ…the scapular needs to be understood as one sign of devotion to her…and of course not in any superstitious way…and yes one may take it on and off…shower etc…no worries.
it is very late …or early…i am only up due to my infant son waking me up and keeping me up…so my answers may not be the best here…for I am very tired
But bottom line: we propose Christ to all…for he is our life…our hope…our salvation…the way to the Father…he is the only way.
But this does not mean that he cannot save those who appear to reject him but really do not…in the end or who do not know him through not fault of their own…his grace can work in ways we do not see…
But anyone who is saved --it is still Jesus who saves them…even if they do not know it explicitly…here on earth…
hope this helps…now i have to try to go back to bed…