I love this passage. By the time we reach verse 35, Jesus has already spoken with the Samaritan woman at the well. He has told the Samaritan woman that there is coming a day when all people can enter his kingdom, and she has learned that he is the Christ, the very one for which they'd been waiting. Chapter four records a blessed day for this woman. It also serves to teach us a valuable lesson.
Christ teaches us (and his followers in the context) that there is work to do. That this work is more important than any fleshly needs or desires, even food. His work was to save souls. He tells his disciples that the fields around them were in need of harvesting. Christ wasn't talking about the grain growing around them. He was talking about the people. The people were in need of teaching, and it was his job, and the job of his followers to teach them.
Today, we must remember that the fields are just as white as they were in Christ's day. We have to bear in mind that we don't choose people for Christ's kingdom based on race or nationality. His church is for all. Our job is to work and to spread the gospel to all creatures. Sisters, it is past time we pick up our Bibles and teach the world around us. Let us spread the love of Christ so that our world will be a peaceful place.