Mary Baker Eddy, the Discoverer and Founder of Christian Science, was an appreciator of music. She knew that it could have a religious character. For ages psalms and hymns have been used by Christian people to express their hopes and aspirations. This greatly enlarged Christian Science Hymnal offers a wide selection of tunes and words which will enable many to express in song that harmony of aspiration and realization which makes music in the heart. The beloved Leader of our movement has said in the Christian Science textbook, Science and Health with Key to the Scriptures (p.304), "Harmony in man is as beautiful as in music, and discord is unnatural, unreal."