It is sad that you actually believe this and doubt the Church that Jesus established for you to make you holy.
I don't doubt the church Jesus established because your institution is not it and it is so far from holy it has its feet in the gates of hell, they are opened wide to recieve it.
I know this because of all the scriptural tests your institution fails, the only one it passes is the bad tree one. Your leaders fail the leadership requirements but they do romp it in for the false wolves and false teachers requirements.
Your institution does not even look like the real church, for a start it is not spotless.
So far the RCs on here have proved they are not holy, so it is failing you guys. I mean RCs talk about loving their neighbours and we see that is far from the truth in their posts. Most RCs like to belittle their neighbours by saying things like: - calling us heretics, making out we are not like them because they are humble etc, they bear false witness like saying we are attacking them, when all we do is post the true facts about their institution and its far from spotless deeds throughout the centuries and its false doctrines, I particularly enjoy the put downs like that went over your head, which is blatantly false, the pride in their institution, their pope and their degrees as if they are the only ones who have degrees. Degrees are not hard to get and those who get them are blessed because that means they got the education opportunities that others don't get. In my state our national tests, shows the only children who really fell behind were those from the lower socio economic areas. That means the kids with better educated parents, who understand the system are advantage. God made us equal, the world makes some more equal than others.
So it is RCs who need to join the real church that Jesus established, they need to follow Him and not their evil leaders.
Jesus wasn't in the RCC and still isn't and I grew up in it for years. Jesus isn't in denominations. He is found in real believers those who are changed by Him. They don't fight the scriptures, they don't ignore scriptures especially 1 Cor 5:11 which your leaders did, they expose sin, they do not falsely accuse others of hating for a start.
To be honest I can really feel God's presence in the shuls and they are not saved yet than I can in an RC building.
Jesus finding me is the greatest thing that has happened in my life, He is there every step with me no matter what is going on. I wish the little girl knew Him when she was young but He has me in His arms. His Spirit leads and guides me and I have evidence of this because he tells me to do things and I am answering a person prayer when I do. I wasn't saved by listening to men, or going to a church. One year my mother asked what I wanted for Christmas and I said a bible. I read it cover to cover, it is amazing you only need a mustard seed of faith and Jesus can use it. I also saw that those false RC doctrines are not in scripture.