How often throughout the centuries these words of the Psalmist have been quoted: "Let the words of my mouth, and the meditation of my heart, be acceptable in thy sight, O Lord, my strength, and my redeemer"! But how seldom has the petitioner assumed any moral obligation to make the meditation of his heart, his habit of thought, acceptable in God's sight! Mortals are prone to shift the responsibility for their welfare to someone else, instead of assuming the obligation of watching their own thoughts.
The Bible teaching on this subject is most explicit. In the allegory in Genesis depicting the material belief of creation, Adam and Eve were warned against partaking of the knowledge of both good and evil. Moses said to the children of Israel, "I call heaven and earth to record this day against you, that I have set before you life and death, blessing and cursing: therefore choose life, that both thou and thy seed may live;" while Joshua and Elijah also called upon the people to make their choice as to whom they would serve. And Christ Jesus warned the multitudes against trying to serve two masters, Spirit and matter.
To-day we have before us not only the life and works of the Master and of the prophets and apostles, but also the complete and scientific statement of Truth in its final revelation, as recorded in the Christian Science textbook, "Science and Health with Key to the Scriptures," and the other works on Christian Science written by Mary Baker Eddy. Furthermore, after Mrs. Eddy had given the world this revelation of Truth she was divinely inspired to write the Manual of The Mother Church for the guidance of Christian Scientists in their application of Christian Science. We are most bountifully blessed to-day, for we have every possible aid except someone to do our thinking for us; and that is an impossibility. We can bear one another's burdens to a certain extent, and profit by each other's experiences. But each individual must do his own thinking, and should regard himself as entirely responsible for his own thoughts.