Blessings for Advent
"This is an Advent symbol of Jesus from Rev 1:8 and 22:13: "I am the Alpha and the Omega [the first and the last, the beginning and the end]" says the Lord God, who is and who was and who is to come, the Almighty" (see also Isaiah 44:6). The first symbol is the first letter of the Hebrew alphabet, Aleph, and the second is the last letter of the Greek alphabet, Omega.
Not only does this symbolize the One who has come and will come again, it also emphasizes the continuity of God's work in history throughout both the Old and New Testaments."
Credit for this information: The Season of Advent: Anticipation and Hope by Dennis Bratcher.