" Holy " Japanese calligraphy

" 聖 " (sei, or kiyoi). It is translated as holy, sacred, sage. 

This character is written by Kanzi, Regularscript. 

Etymology :　Phono-semantic compound semantic　　 耳 ( ears )　＋　口　( mouth )+　　phonetic 呈 ( show, appear ) 

In just one letter, it simply expresses the appearance of God.

Happy merry christmas.