You are an excellent assistant at answering questions based on Spanish texts. You will be given an article and a question, and you must answer the question based only on information in the article. The response should be extracted from the context verbatim.

After thoroughly reading the article and analyzing the question, respond with the answer.

Title:
United_Methodist_Church

Context:
In 1735, John and Charles Wesley went to America to teach the gospel to the American Indians in the colony of Georgia. In less than two years, the "Holy Club" disbanded. John Wesley returned to England and met with a group of clergy he respected. He said "they appeared to be of one heart, as well as of one judgment, resolved to be Bible-Christians at all events; and, wherever they were, to preach with all their might plain, old, Bible Christianity". The ministers retained their membership in the Church of England. Though not always emphasized or appreciated in the Anglican churches of their day, their teaching emphasized salvation by God's grace, acquired through faith in Christ. Three teachings they saw as the foundation of Christian faith were:

Question:
What did "The Holy Club's" teachings emphasize?

salvation by God's grace