Dictionary

A and O, or ALPHA and OMEGA, the first and the last letters of the Greek alphabet, are four times used by Christ, Rev 1:8, Rev 1:11[omitted in oldest MSS.] ;Rev 21:6; Rev 22:13, just as the phrase "The first and .... the last" is used by Jehovah, Isa 41:4;Isa 44:6, to express the idea of eternity, and also of divine causality. The Church very early adopted these two letters as a symbol of the eternal divinity of our Lord, and used it extensively on monuments of every description, sometimes alone, but more frequently in connection with the cross and the monogram of Christ in its various forms, as