When did it all go wrong? IT DIDN'T!! Jesus said 'Upon this rock I will build my Church and the GATES OF HELL will NOT prevail against it.' If it had 'all gone wrong' then the gates of hell would surely have prevailed against it and Jesus would have been wrong. Mormons claim 'it all went wrong' as well.
No, it never went wrong. Jesus did build his church upon his rock--himself. "For other foundation can no man lay than that which is laid, which is Jesus Christ" (1Cor.3:11).
1 Corinthians 10:4 And did all drink the same spiritual drink: for they drank of that spiritual Rock that followed them: and
that Rock was Christ.
The Rock is Christ; Peter a stone. Peter is no greater in Scripture than Levi (a publican--a horrible sinner), or Bartholomew, or doubting Thomas. They are all put on equal footing. They are called "The Twelve Disciples." Only one of them was not genuine, and Christ knew that from the beginning. He was replaced by Matthias (Acts 1), after the resurrection. In the same chapter we find that Mary is outside of this inner circle. She is among the 120, but not the 12. She does not have the authority, the importance as Bartholomew or Thomas, or even Simon the zealot. In authority she is placed beneath them.
Revelation 21:14 And the wall of the city had twelve foundations, and in them
the names of the twelve apostles of the Lamb.
--Note that Mary's name will not be written there. Simon the zealot will be there. Bartholomew and Thomas's names will be there. But not Mary. her place in history is rather insignificant.
Think of it: She played a "Passive" role. She allowed her body to be used to allow Christ to come into the world. This was something that one of many other virgins of that time could have done. But God in his sovereign will chose Mary. He had to choose someone.
Like any parent she (and Joseph) raised Jesus (and the children that they had after Jesus), until the time of the beginning of the ministry of Christ.
After the death of Christ John took her to his home where she lived out the rest of her life, as well as being in presence of the disciples and other believers as found in Acts chapter one. There is little else written about her that is factual.
On the other hand all the other Apostles were cruelly martyred except John who was exiled. Even then, some believe that he was boiled in a great cauldron of oil.
Thomas went to India. There is ample evidence of Thomas being the Apostle to India, where he won many to Christ, and brought the gospel to South Asia. After a successful work he was murdered--shot through with arrows.
Who did the greater work?
1. God chose Mary that Christ would enter the world through her womb. Her body was being used as a vessel and that is all.
2. God chose Thomas to be an Apostle to the nation of India where the gospel was introduced to that continent. There hundreds, if not thousands, entered into the Kingdom of God because of work and obedience of Thomas. Thomas was martyred for his faith.
Jesus referred to "greater works will you do."
Thomas was doing these greater works--the works of winning souls to Christ. Eternity will show that his name will be found on the wall of the foundation of that heavenly city, and not Mary's. Eternity will show that Thomas won many more souls to Christ than Mary. Eternity will show that Thomas became closer to Christ than Mary, whom Jesus eventually referred to as "woman," for Thomas (and the other eleven) were his disciples, his followers, those who traveled, ate, slept and were closely taught by him.