As we begin a new year, we should resolve to stay close to God's will for us. In Ephesians 4, Paul points out that God's will for the church is that the church grow in maturity. We need to believe and act in order to do so.
In Acts 2, we see an example of what a maturing, growing church did: they focused on discipleship, fellowship with each other, deep care for each other (even selling property to care for each other), and outreach in the community. As a result, God blessed them so they could continue blessing others.
Let us resolve to focus on those core doctrines in Eph 4:1-6 and on those core practices in Acts 2:42-47 to become the growing, strong, mature church God desires us to be.