Nice simple explanation:
Seen in this sense (and “spoken” in second-person, with a little application of poetic license), the phrase is intended as a sort of a “wish” or a “spell,” (cast by the writer upon the reader):
“May you die and be reborn, In the limitless extending Light of Godhead.”
Methaphorical Meaning For Non-Sectarians:
“May you change, and keep changing unto perfection.”
Full Story: As If Productions: What does LVX mean?
(via Zetetic23 )