What is the Bridge in Scientology?
Many higher states of existence are available to Man, and these are attainable through Scientology. L. Ron Hubbard provided a precise delineation of these states, and then clarified how they could be attained by arranging them on a chart which graphically showed each step of the route upward.
The chart that shows the gradations to spiritual betterment is called the Classification, Gradation and Awareness Chart. Classification refers to training  in Scientology and the fact that certain actions are required, or skills attained before an individual is classified as an auditor at any particular level and allowed onto the next class. Gradation refers to the gradual improvement spiritually that occurs in Scientology auditing .
Man, in his religious tradition, has long imagined a bridge across the chasm between where one is now and a higher plateau of existence. Unfortunately, many of those attempting to cross the chasm fell into the abyss.
Employing this metaphor, the Classification, Gradation and Awareness Chart represents, in fact, the bridge which spans the chasm and brings one to the higher plateau. This is the vision Man has cherished for at least ten thousand years, and it is now attainable by following the steps as laid out on the chart.
The chart is a guide for the individual from their first awareness of Scientology to each higher state. Man has never before had such a map. It is the Bridge to Total Freedom. It is the route. It is exact and has a standard progression. One walks it and one becomes free.