All the error that has existed down the ages is founded on the theory or belief of two worlds, one the heavenly kingdom, or spiritual life, and the other a material world or mortal existence, each separate from the other. In spite of this sense of two worlds, men have always attempted to bring harmony into the discords of human existence through an attempt, by prayer, to contact this other world, or spiritual realm, and to bring Spirit, or God, to act upon the so-called material existence. Let us begin with the understanding that our world is not an erroneous one, but rather that the universe in which we live is the realm of reality about which man entertains a false concept. The work of bringing health and harmony into our experience is not, then, getting rid of, or even changing, a mortal material universe, but correcting the finite concept of our existence. This is the first edition text.