In attempting to learn some Greek by reading the Apocalypse two
questions have occurred to me:

1.   'Eucharist' (Rev. 7:12) means 'thanksgiving'.   How, when and
why did it become a synonym for the Holy Communion service ?

2.  The four 'zoa' of Rev. 4 (based on Ezekiel 1) have become the
symbols of the four evangelists.   How, when and why ?

Arthur Wilson