Mary Baker Eddy, Discover, Founder of Christian Science, defines Christian Science this way in her book Rudimental Divine Science, page 1:1-4. “The law of God, the law of good, interpreting and demonstrating the divine Principle and rule of universal harmony.”
Christian Science teaches that Christ Jesus is the Wayshower. It accepts the essentials of Christianity as founded in the Scriptural record of the life and teachings of Christ Jesus. Christian Science explains that the divine laws of good are constant, reliable and stable.
There is nothing mysterious or complicated about this Science. Even children can understand and demonstrate it. Trusting in the power of good describes the childlike thought. No situation is too insignificant or too hard for God’s love to correct. None of us needs to feel left out or cut off from that divine law which corrects and save.
Eddy also states,” It has one God. It demonstrates the divine Principle, rules and practice of the great healer and master of metaphysics, Jesus of Nazareth. It spiritualizes religion and restores its lost element, namely, healing the sick. It consecrates and inspires the teacher and preacher; it equips the doctor with safe and sure medicine; it encourages and empowers the business man and secures the success of honesty. It is the dear children’s toy and strong tower; the wise man’s spiritual dictionary; the poor man’s money; (Miscellaneous Writings page 252:22-31).
The Bible states that God created man in His own image. (See Genesis 1:27)
Studying the Bible us helps to know God and our relationship to Him. The more we study the Bible, the more we discover its value; this study enables us to find comfort, guidance, stability, and the ability to overcome limitations. The spiritual light and understanding it imparts enable us to heal, and to gain dominion over human struggles of every kind. Christian Science teaches us to look to God as the Source of our health, harmony, peace, security, and success.
A fuller explanation is found in the Christian Science textbook, Science and Health with Key to the Scriptures, by Mary Baker Eddy.