We finde book :

Book of mormon student manual religion 121 and 122 - Student Manual Religion 121–122

I heard a story in church one Sunday that illustrates this principle very well. A woman in my neighborhood had a friend with cancer. Her friend was told in blessings she received from those holding proper priesthood authority that she would be healed. Months went by and she was not getting any better in fact she was slowly getting worse. One night as she was on her knees in prayer she was given the impression that she needed to be grateful for any improvements she saw in her health. She started thanking Heavenly Father in her prayers for the tiniest improvements and was healed. The Lord blessed her for showing gratitude.

This article was written by Shannon O., a student at Brigham Young University and a member of The Church of Jesus Christ of Latter-day Saints.