The cross, a symbol which predates Christianity by thousands of years, and versions of which have been used by such diverse ancient peoples as the Phoenicians, Hindus, Navajos and Aztecs, has a special design and significance in the Scientology religion.
The Scientology religion divides the life force of the thetan into eight subdivisions called dynamics. Thus, in addition to the four arms of the cross, the Scientology cross also has four rays which emanate diagonally from the center. Together, the arms and rays symbolize the eight dynamics.
The most basic religious significance of the Scientology cross is that of the spirit and the difficulties of its progression through the material universe. The horizontal bar represents the material universe, and the vertical bar represents the spirit. Thus, the spirit is seen to be rising triumphantly, ultimately transcending the turmoil of the physical universe to achieve salvation.
The cross has other messages as well. The four arms point to the four main points of the compass and thus symbolize the idea that spiritual development extends in all directions and encompasses all of life. Both the horizontal and vertical arms end in the standard heraldic symbols for leaves and flowers, known as the “Cross Fleury” or “Flowery Cross”. This symbolizes the full flowering of the individual.