Joseph Aldrich wrote a book several years ago entitled, "Lifestyle Evangelism." His central point is that Christian people need to build bridges of friendship with people who are without a spiritual home. It is across these "bridges" that people can be gently nudged towards the love of God and the support of a caring Christian fellowship.
It is one thing to see the harvest. And it is important to see it. It is another thing to care about the harvest. And it is important to care about the harvest. It is something else entirely to go into the harvest. Seeing and caring can be done from a distance - but entering into the harvest is to make a commitment to join with Christ in solving God's biggest problem. Harvesting cannot be done from a distance. God set the model for harvesting in the incarnation of Christ. As God came in the flesh through Jesus Christ to stand next to us and bear us up - so also we are called to enter the harvest and bear others up in the love of God.
Aldrich in his book suggests that the church has developed a style whereby we "call out to the harvest" to come in and be harvested. It is the opposite of how Jesus worked. Jesus left the splendor of heaven for the dreariness of the world. He came to where the harvest was and carefully and lovingly reaped the harvest. Then he said to his closest followers, "As the Father has sent me, so send I you!"