A Fundamental teaching of Christian Science is that God is good. Hence good, and only good, pervades the spiritual universe. Spiritual man, God's image, expects good, finds only good, and has no ability to experience anything other than good. Good is substance, and because it is infinite in variety, the loving and expressing of good completely satisfies. The omnipresence of good precludes the possibility of sorrow, sin, disease, and death as conditions of reality, even as light precludes darkness.
Mortals, however, experience much that is unlike good. In fact, they expect evil, consider sickness and misfortune to be natural concomitants of life, and decline, senility, and death to be inevitable. Ignorant of divine law, they believe themselves to be more or less at the mercy of chance and hence are largely unresponsive to the great power of God, which is ever operating in their midst to provide all good.
Throughout her writings Mary Baker Eddy emphasizes the fact that harmony and good are natural. In "Science and Health with Key to the Scriptures" she writes (p.119), "God is natural good, and is represented only by the idea of goodness; while evil should be regarded as unnatural, because it is opposed to the nature of Spirit, God." As his understanding of God increases, the student of Christian Science finds the sense of good to be a more natural and constant accompaniment of his daily life. Since God "is represented only by the idea of goodness," our great need, if we would increasingly experience natural good, is to accept and entertain only this idea.
