In Unity of Good Mary Baker Eddy brings forward the ability of the believer to heal and avoid illness. "The true man, really saved, is ready to testify of God in the infinite penetration of Truth, and can affirm that the Mind which is good, or God, has no knowledge of sin." _____________________________ "Perhaps no doctrine of Christian Science rouses so much natural doubt and questioning as this, that God knows no such thing as sin. Indeed, this may be set down as one of the "things hard to be understood," such as the apostle Peter declared were taught by his fellow-apostle Paul, "which they that are unlearned and unstable wrest ... unto their own destruction." (2 Peter iii. 16.) "Let us then reason together on this important subject, whose statement in Christian Science may justly be characterized as wonderful. "Does God know or behold sin, sickness, and death?" Mary Baker was the founder of the Christian Science. She wrote over a dozen books, including Science and Health with Key to the Scriptures, established the Christian Science Publishing Society, and involved herself in extensive research in "the effects of unseen mental influences and beliefs on sick patients."