Janus roman representation of the Alpha and Omega
Revelation 22 Alpha and the Omega
God Is the Alpha and Omega Is only found in Revelation. Most scholars think it was written near the end of the 1st century. It is a more a Roman concept of God as in Janus and most evidence shows that it is not seen in Christian lore until after 325 AD. I however it gives us today a more real concept of God than a human like father in heaven playing games with us. Along with the Greek concept of the Trinity which is given to Christianity, also a Roman, Paul, we have our modern Christian concept of God.
From... http://www.newadvent.org/cathen/01332a.htm
"The question whether this symbol in its regular form, was in use before the Council of Nicaea (325) has not yet been settled definitely."