I am a missionary, heart and soul. God had an only Son, and He was a missionary and a physician. I am a poor, poor imitation of Him, or wish to be. In this service I hope to live; in it I wish to die!

David Livingstone (Missionary, 1813 – 1873)

David Livingstone was a missionary to Africa and he was also a doctor. He did exactly what he said in this quote. He lived and died doing this missionary work. He went into the interior of Africa and mapped out a lot of it for the Geographical Society, while preaching the gospel to all of those tribes of people that he came across.