It seems, at first blush, as if an examination of the well-known _odium theologicum_, or the traditional bitterness which has been apt to characterize controversies about points of doctrine, from the Middle Ages down to a period within our own memory, would throw some light on the matter. But a little consideration will show that there are special causes for the rancor of theologians for which word-criticism has no parallel. The _odium theologicum_ was the natural and inevitable result of the general belief that the holding of certain opinions was necessary to salvation, and that the formation of opinions could be wholly regulated by the will. This belief, pushed to its extreme limits and embodied in legislation, led to the burning of heretics in nearly all Christian countries. When B's failure to adopt A's conclusions was by A regarded as a sign of depravity of nature which, would lead to B's damnation, nothing was more natural than that when they came into collision in pamphlets or sermons they should have attributed to each other the worst motives. A man who was deliberately getting himself ready for perdition was not a person to whom anybody owed courtesy or consideration, or whose arguments, being probably supplied by Satan, deserved respectful examination. We accordingly find that as the list of "essential" opinions has become shortened, and as doubts as to men's responsibility for their opinions have made their way from the world into the church, theological controversy has lost its acrimony and indeed has almost ceased. No theologian of high standing or character now permits himself to show bad temper in a doctrinal or hermeneutical discussion, and a large and increasing proportion of theologians acknowledge that the road to heaven is so hard for us all that the less quarrelling and jostling there is in it, the better for everybody.