For the most part, everything we say and do, derives from "pagan" rite, ritual, and religion.
13 + 13 = 26, the number of letters in the English (read that fallen Angelish) Alpha(Set).
Spell H-O-L-L-Y-W-O-O-D curs(ive).
Hell(o). O' hell.
Hence, the command to "not be conformed to this world."
We'd have to walk around in white robes and form our own new language which would then be co-opted by Lucy.
Let's remember the Reason for the Season and we have the liberty that we are on the right path.
http://boingboing.net/2012/12/24/gary-gygax-explains-why-christ.html