We must always guard our hearts, minds, and emotions from evil. If we do not put up barriers, they will take over and cause us to fall. Proverbs 25:28 says, Like a city whose walls are broken down is a man who lacks self-control. While self-control will limit us for sure, it is necessary because being out of control only leads to vulnerability to attack from the enemy. Self-control is our wall of defense and we should constantly strengthen and reinforce it.