"But you will receive power when the Holy Spirit has come upon you, and you will be my witnesses in Jerusalem and in all Judea and Samaria, and to the end of the earth." (Acts 1:8 ESV)
Recently I have been processing through this issue of the advance of the Gospel and my own intentionality to it. Frankly I'm pretty poor at being intentional with the Gospel. For many evangelicals today we think that being intentional with the Gospel means leaving a tract at the table with a meager tip for the waitress. Or we believe that we have been faithful to the Gospel when we stand on a street corner and preach to all those who walk by for hours on end (who still does that?). I'm not saying that those things aren't effective, but I think there has to be a better way to be intentional with the Gospel.
I think that starts by taking a view of where I live. Do I know my neighbors? Do I spend time with them? Are we building direct, involved, intentional relationships with the people that immediately surround us where we live, or are we just occupying a house so that no one around will bother us? The Gospel is intentional. I must be too.