The great Pioneer Missionaries all had 'inverted homesickness' this passion to call that country their home which was most in need of the Gospel. In this passion all other passions died; before this vision all other visions faded; this call drowned all other voices. They were the pioneers of the Kingdom, the forelopers of God, eager to cross the border-marches and discover new lands or win new-empires - Samuel Marinus Zwemer