The following excerpt is from Unity.org:
Myrtle Fillmore was afflicted with tuberculosis at a young age and spent many years believing she was incurably weak and sickly. While attending a lecture by metaphysician Dr. E.B. Weeks in 1886, Myrtle learned of her innate potential for divine healing through the use of affirmative prayer. She began regularly affirming, “I am a child of God, and therefore I do not inherit sickness.” Over time, she was healed of the tuberculosis that had threatened her life. Myrtle was so excited about her healing discovery that she began working with others in need of healing. Eventually she and her husband Charles pioneered a spiritual healing support system that grew into the Silent Unity 24/7 prayer ministry still operating today. Myrtle lived to be 86 years old, making her transition in 1931.
The following quote is from her manuscripts and personal papers held by the Unity Library and Archives:
The light of God revealed to us—the thought came to me first—that life was of God, that we were inseparably one with the Source, and that we inherited from the divine and perfect Father. What that revelation did to me at first was not apparent to the senses. But it held my mind above negation, and I began to claim my birthright and to act as though I believed myself the child of God, filled with His life. I gained. Others saw that there was something new in me. They asked me to share it. I did. Others were healed, and began to study. My husband continued his business, and at first took little interest in what I was doing. But after a time he became absorbed in the study of Truth too. We consecrated ourselves to the Lord, and kept doing daily that which we felt led to do. We began to prosper, a little at a time, and our health continued to improve.