alpha (Α) and omega (Ω) are the first and last letters, respectively, of the classical (Ionic) Greek alphabet. Thus, twice when the phrase "I am the alpha and the omega '' appears it is further clarified with the additional phrase, "the beginning and the end '' (Revelation 21: 6, 22: 13). The first and last letters of the Greek alphabet were used because the book of Revelation is in the New Testament, which was originally written in Greek.
meaning of i am the alpha and omega
the beginning and the end