Martin Luther had an observation about that subject:
"If I profess with the loudest voice and clearest exposition every portion of the word of God except precisely that little point which the world and the Devil are at that point attacking, I am not confessing Christ, however boldly I may be professing Christ. Where the battle rages, there the loyalty of the soldier is tested. To be steady in all the battlefields besides is mere flight and disgrace, if the soldier flinches at that one point."