Alpha and Omega

Alpha (α) and omega (Ω) are the first and last letters of the Greek alphabet and figuratively represent the concept of "the First and the Last" and "the Beginning and the End."

It is used as a title to describe God (Rev 1:8; 21:6) and Jesus Christ (Rev 22:12-13), and it acknowledges their role as the Creator and the Judge.

The phrase "first and last" is used to indicate completeness, which can be seen in how they are used of the works of Israel's kings: David (1 Chron 29:29), Solomon (2 Chron 9:29), Rehoboam (2 Chron 12:15), Asa (2 Chron 16:11), Jehoshaphat (2 Chron 20:34), Amaziah (2 Chron 25:26), Uzziah (2 Chron 26:22), and Josiah (2 Chron 35:26-27).

It is used as a title to describe God (Isa 44:6; 48:12) and Jesus Christ (Rev 1:17; 2:8), and it acknowledges their eternal existence as personal Beings.

Because there is only one God (Deut 32:39; Isa 43:11; 44:6), the fact that both God and Jesus Christ share the same title is further evidence of the Trinity.