Then there is the most important subject of the expansion of consciousness. There are two directions or dimensions in which to expand. The one is the outward, the other the inner dimension. One dimension is pictured as a horizontal, the other as a perpendicular line. These two dimensions together form a cross, the symbol of the Christian religion. But before the Christian religion it existed in Egypt and Tibet; and in the ancient Buddhist and Tibetan symbolical pictures you will also find the symbol of the cross.