I remembered reading a quote that was really good in one of Francis Schaeffer's books a long time ago. I looked a long time for it, but couldn't find it anywhere until today when my son mentioned reading it and told me where it was. It was in The God Who is There.

If I profess with the loudest voice and clearest exposition every portion of the truth of God except precisely that little point which the world and the devil are at that moment attacking, I am not confessing Christ, however boldly I may be professing Christ. Where the battle rages, there the loyalty of the soldier is proved, and to be steady on all the battlefield besides, is mere flight and disgrace if he flinches at that point.-- Martin Luther