Our Revelation passage reminds me of how absolutely set in sin people can be. No matter the proof, no matter the horrific consequences of unbelief, they persist in rejecting Jesus.
May we always be willing to share Christ with those around us, but let us remember that we do not have control over their hearts. It is up to the Holy Spirit to work in their lives, and they will be judged based on their reception or rejection of Him. Our "success" is not determined by whether or not they believe, but by whether or not we obey when we are called to share the gospel.
Tomorrow's Bible In a Year Passage: Job 13-15, Revelation 16:12-21