were there any devoted Catholics who denounced the corruption within the Church and who, unlike Martin Luther and his companions (John Calvin etc.), did not leave Her, but rather, continued to love Her in spite of the situation?
John Colet (1467-1519) was dean of St. Paul's Cathedral and the founder of St. Paul's School in London. A close friend and spiritual mentor of Erasmus and Thomas More. Noted for his own study of Paul's epistles, it was Colet's influence thatdirected Erasmus' attention to the Scriptures, and from him, Erasmus got his historical method of interpretation. Durant says of Colet:that though he was "an asserter and defender of the old theology, he astonished his time by practicing his Christianity."
The Catholic Reformation is also referred to frequently as the Counter Reformation. If it was truly a Counter Reformation, then it must have been called forth or at least greatly influenced by the Protestant Reformation. But it is also evident that there were widespread impulses for reform within the church before anyone had ever heard of Luther.
Many distinguished men saw the needs of the church and tried early to do something about them. Among these men were Gian Matteo Giberti and Gian Pietro Caraffa. About 1517 these men and others founded at Rome the Oratory of Divine Love to restore to its proper dignity the observance of Divine Service. This group was not a religious order, and its members took no vows. They worked in Rome until the sack of the city in 1527 forced them to leave. One of the manifestations of the stirrings in the church was the foundation of new religious orders and the reform or refounding of older ones. The Camaldolese were reformed and brought back to a very ascetic way of life under the leadership of the famous Venetian family of the Giustiniani. In 1524 the Theatines were founded by Caraffa and Gaetano da Thiene. The members were priests, and their aim was the reform of the regular clergy
Interesting trivia fact about St. Teresa - she died on the night of October 4, 1582, after Vespers, so her death belongs to the following day, October 15, since this was when the calendar was reformed.