Jesus went through all the towns and villages, teaching in their synagogues, proclaiming the good news of the kingdom and healing every disease and sickness. When he saw the crowds, he had compassion on them, because they were harassed and helpless, like sheep without a shepherd. Then he said to his disciples, “The harvest is plentiful but the workers are few. Ask the Lord of the harvest, therefore, to send out workers into his harvest field.”

Matthew 9:35-38 (NIV)

Just as a body, though one, has many parts, but all its many parts form one body, so it is with Christ.  For we were all baptized by one Spirit so as to form one body—whether Jews or Gentiles, slave or free and we were all given the one Spirit to drink.  Even so the body is not made up of one part but of many.  

1 Corinthians 12: 12-14 (NIV)