Another example would Gladys Aylworth, whose biography by Alan Burgess (ISBN: 9780330101967): The Small Woman is something worth reading by those who want to preach the Gospel.
A minor incident in this book (The Small Woman) is that she meets a couple from Holland on her trip to China via the Orient Express.
The couple promised to pray for her. She was a petit woman making the trip to China by herself. It was an example of her great faith.
But people in England (people in a Missionary Society, other people, the Travel Bureau) all probably had her in her prayers.
The point of that is that there seemed to extra-ordinary intervention in her life. She was often spared when confronted with extremely dangerous situations.
One such example was that the Orient Express had to stop because of a war. She eventually decided to walk to the nearest (by herself) town at night.
When she arrived in the town, she commented about why they dogs run free in the area.
This was a vicious pack of wolves.
The Soviet Union, at that time, was not a place for a single woman to be...
For Gladys Aylward, she lived a life of Great Faith.
Without speaking the Gospel Theresa was just a nice lady.
Mormons do nice things. Are their beliefs right or wrong?
http://www.challies.com/archives/articles/the-myth-of-mot.php
While she worked with the poor, Mother Teresa was adamant that any type of evangelism was unnecessary. In her book, Life in the Spirit: Reflections, Meditations and Prayers, she says:
“We never try to convert those who receive [aid from Missionaries of Charity] to Christianity but in our work we bear witness to the love of God’s presence and if Catholics, Protestants, Buddhists, or agnostics become for this better men — simply better — we will be satisfied. It matters to the individual what church he belongs to. If that individual thinks and believes that this is the only way to God for her or him, this is the way God comes into their life — his life. If he does not know any other way and if he has no doubt so that he does not need to search then this is his way to salvation.” (Pages 81-82)