First off, it is a matter of historical record that Calvinists do indeed witness. That should be beyond dispute to anyone who takes time to do proper research of missions from the 17th century to the present. In spite of this it is common for non-Calvinists to wonder why Calvinists witness. This, I think, is primarily because the questioner does not properly grasp Calvinist teachings. Of course this should not be a surprise because many self-proclaimed Calvinists disagree with one another on these matters. Here is a link to a very good answer to this question. This post troubles me, though, because the most obvious answer to me is that we witness because God tells us too. As the linked post shows, this is seen by some as a "cop-out". Honestly, I do not understand this objection. Slaves are commanded to obey their masters "with fear and trembling, with a sincere heart, as you would Christ". So, it goes without saying that we ought to obey Christ with fear and trembling. However, some still insist that this is not reason enough. Anyway, I was thinking about this today, and I wonder about something. This question is especially for non-Calvinists, although all may play. The question is, why did Jeremiah prophesy? He preached for over forty years, even though he knew that at the end of the day no one would listen to him and that his country and his city would be destroyed. So, why bother? What do you think? What kept Jeremiah going?