Logos: (log' -os) something said, a topic, also reasoning (the mental faculty) or motive; by extension a computation; specially the Divine (when with the article in John;) account, cause, communication...
The Greek word Logos is usually translated as "Word." But, it hides in Acts 18:14 and in I Peter 3:15. The Last passage is the headline tag I use at the top of my Reason 2 Believe Him website home page:
1 Peter 3:15 But sanctify the Lord God in your hearts: and be ready always to give an answer to every man that asks you a reason of the hope that is in you with meekness and fear:
So, as you can see, the same Greek word is translated not only as "word," but as reason...my reason for believing. Now try John 1:1 the other way around...which would still be correctly translated:
In the beginning was the "REASON," and the "REASON" was with God, and the "REASON" was God. The same was in the beginning with God. All things were made by Him; and without Him was not anything made that was made. In Him was life; and the life was the light of men. And the light shineth in darkness; and the darkness comprehended it not. John 1:1-5 God is our reason. Yet the darkness couldn't understand the reason.