And when they came to a place called Golgotha (which means Place of a Skull).
Jesus was crucified on a hill that had a peculiar name, meaning "skull hill". Jesus died there to save us from our sins. Our bodies participate in sin and we speak out sinful things, but it originated in our minds, in our thoughts. How we think needs to be saved. I don't want to just stop doing things and saying things, having been saved unto righteousness; I also want to think in a godly way, in a Christ-forgiven way!
If the mind is important, then the enemy is going to go after it. It's important to decide to let Christ rule in your mind, if you are his. If the enemy can get in your mind, in how you think, then he's got you immobilized. Figuratively speaking, you may need anti-virus software for your hard drive, if a trojan or worm has gotten in.