“Symbols of divine truth were not invented for the amusement of the ignorant;
they are the alpha and omega of philosophic thought.”—H.P.B.
“The philosophical cross, the two lines running in opposite directions, the horizontal and the perpendicular, the height and breadth, which the geometrizing Deity divides at the intersecting point, and which forms the magical as well as the scientific quaternary, when it is inscribed within the perfect square, is the basis of the occultist. Within its mystical precinct lies the master-key which opens the door of every science, physical as well as spiritual. It symbolizes our human existence, for the circle of life circumscribes the four points of the cross, which represent in succession birth, life, death, and immortality.”—Isis Unveiled, I:508
Cross (Encyclopedic Theosophical Glossary)
The Cross (Hermes, Symbol Series)