The symbol itself is the equivalent of the ancient Egyptian Ankh, or the Rosicrucian's Rosy Cross; which represents the microcosmic forces (the pentacle, representation of the pentagram with 5 elements, the Pentagrammaton, YHSVH or Yahshuah) interweave with the macro-cosmic forces (the hexagram, the representation of the planetary or heavenly cosmic forces, the divine). Source: https://en.wikipedia.org/wiki/Unicursal_hexagram