2 Samuel 24:10 David was conscience-stricken after he had counted the fighting men, and he said to the Lord, “I have sinned greatly in what I have done. Now, Lord, I beg you, take away the guilt of your servant. I have done a very foolish thing.” 
Sometimes, the consequences of our sin only reaches our conscience when we have counted the cost. Lord, may I not sin against You, so that I may not have to suffer the cost of my transgressions.