Certainty

The Bible starts with the voice of God and ends with the voice of God.  It’s that voice and the written Word that gives us absolute certainty in the message of a never-failing God.  
Scripture:  John 1:1-14, Rev 10:7, Rev 19:12-13, Matt 1:17, Num 33:1-2, Mark 1:1-3, Luke 1:1-4