That is a good sort of insanity. It is a sad pity that it is so rare. If there were more of it there would not be so many unsaved souls dying under the very shadow of our churches; it would not be so hard to get missionaries and money to send the gospel to the dark continents; there would not be so many empty pews in our churches, so many long pauses in our prayer-meeting, so few to teach in our Sabbath schools. It would be a glorious thing if all Christians were beside themselves as the Master was, or as Paul was.
It is a far worse insanity which in this world never gives a thought to any other world; which, moving continually among lost men, never pities them, nor thinks of their lost condition, nor puts forth any effort to save them. It is easier to keep a cool head and a colder heart, and to give ourselves no concern about perishing souls; but we are our brothers’ keepers, and no malfeasance in duty can be worse than that which pays no heed to their eternal salvation.
J. R. Miller in "Come Ye Apart"