"Being gospel-centered has two dimensions. First, it means being word-centered because the gospel is a word. The gospel is good news. It is a message. It is a message that can be summarized in simple gospel outlines or even the three-word confession, 'Jesus is Lord.' Yet is is also a message that fills the entire Bible. It is the story of salvation from creation to new creation. It is a word that has become incarnate in Jesus Christ. It is this word that brings new life to people and shapes the life of the church.
Second, being gospel-centered means being mission-centered, for the gospel is a missionary word. The gospel is good news. It is a word to be proclaimed. You cannot be committed to the gospel without being committed to proclaiming that gospel." -- Tim Chester and Steve Timmis, Total Church, pg. 32.