In ancient Christian art, χ and χρ are abbreviations for Christ's name.<quoted text>Actually Susie does not REPLACE Christ with an X so that makes me a TRUE Christian..
The word "Christ" and its compounds, including "Christmas", have been abbreviated in English for at least the past 1,000 years, long before the modern "Xmas" was commonly used. "Christ" was often written as "XP" or "Xt"; there are references in the Anglo-Saxon Chronicle as far back as 1021. This X and P arose as the uppercase forms of the Greek letters χ (Ch) and ρ (R) used in ancient abbreviations for Χρι στο ς (Greek for "Christ"), and are still widely seen in many Eastern Orthodox icons depicting Jesus Christ. The labarum, an amalgamation of the two Greek letters rendered as ☧, is a symbol often used to represent Christ in Catholic, Protestant, and Orthodox Christian Churches.
The Oxford English Dictionary (OED) and the OED Supplement have cited usages of "X-" or "Xp-" for "Christ-" as early as 1485. The terms "Xtian" and less commonly "Xpian" have also been used for "Christian". The OED further cites usage of "Xtianity" for "Christianity" from 1634. According to Merriam-Webster's Dictionary of English Usage, most of the evidence for these words comes from "educated Englishmen who knew their Greek".
In ancient Christian art, χ and χρ are abbreviations for Christ's name. In many manuscripts of the New Testament and icons, Χ is an abbreviation for Χρι στο ς, as is XC (the first and last letters in Greek, using the lunate sigma); compare IC for Jesus in Greek.
Can you say "duh"?