I am sure you would say, first of all, a man who is to be a soul winner must have holiness of character. How few who attempt to preach think enough about this. If they did, it would strike them at once that the Eternal would never use dirty tools, that the very-holy Jehovah would only select holy instruments to accomplish His work. No wise man pours his wine into dirty bottles. No kind and good parent allows his children to go to see an immoral play or movie. In the same way, God will not work with instruments who compromise His own character.