The world is full of unhappy people living unhappy lives. Here we have Christ who can make us anew and change our lives. Of course, many heard about him and choose not to accept him. But there are many more who have not even heard about him! It's a case of "the harvest is abundant but the laborers are few." Sadly, Christians in general have not taken the Lord's last command "Go into the whole world and proclaim the gospel to every creature" seriously. They need to know the Lord more to feel the urgency of bringing him to others. Otherwise, they'll have to answer to the Lord one day.