Right,there are many people that go about doing good,and claiming Christ,that never experience a relationship with Jesus,and sometimes it is because of the grave errors they believe,that takes away glory from God,which the Roman Catholic Church has grave errors taking away from the glory of God,like the reverence of Mary,and the reverence of the Pope,and other beliefs that causes them to not get close to God,but they do not understand that,thinking there is no wrong in the Roman Catholic Church.
But some people think those errors do not matter,for God loves people,who claim Jesus,which some wrongful beliefs will not hinder a person from making it to heaven,but some errors are serious causing them to not get close to Jesus,by honoring people,and objects,and not giving all glory to God.
It is not that God is not reaching out His hand to help them,but he cannot get close as long as people honor,and reverence,people,and things,and not giving Him the glory,that only goes to Him.
But of course she might of had doubt,coming from her own self,that caused her to waver in her belief,but being part of the Roman Catholic Church,it only made the feeling worse to not get close to Jesus.
Luk 10:38 Now it came to pass, as they went, that he entered into a certain village: and a certain woman named Martha received him into her house.
Luk 10:39 And she had a sister called Mary, which also sat at Jesus' feet, and heard his word.
Luk 10:40 But Martha was cumbered about much serving, and came to him, and said, Lord, dost thou not care that my sister hath left me to serve alone? bid her therefore that she help me.
Luk 10:41 And Jesus answered and said unto her, Martha, Martha, thou art careful and troubled about many things:
Luk 10:42 But one thing is needful: and Mary hath chosen that good part, which shall not be taken away from her.
Jesus visited the house of Martha,which she went about serving,and Mary sat at the feet of Jesus,and listened to His word,which Martha complained to Jesus to tell her to help her,but Jesus said that it is needful,and Mary has chosen that good part,which shall not be taken away from her.
So it does not matter if we labor 12 hours a day going about doing good,for if we do not have a personal relationship with Jesus,in the long run we will not benefit,for that is what matters is having a spiritual relationship with Jesus,although it is good to go about doing good,which pleases God,but does not please Him enough,if you do not have a spiritual relationship with Jesus.
I believe the way the Roman Catholic Church believes things,and gives reverence to people,and things,that is does not allow God to be close to them like He wants,for they do not give glory to Him like they should,giving glory to other things,and Mother Theresa felt this,but did not realize this,that it is because of the belief system that she was in,and she got more discouraged about it,which means she cared a great deal to be close to God,but could not sense it,and I believe God loved her very much,and was slapping her upside her head,and trying to pull her out of that system.
But she may of had doubt about the whole Christian business to begin with,but still pursued in it,but I believe a lot of people do not get close to God,because of what they believe that take away from God,instead of honoring Him.