Just as we need a strong physical core to support our physical body to maintain our balance in basic core strength for lifting and reaching, we also need to have our spiritual core strong so when we are up against the enemy or worldly situations that are contrary to God's ways, we will have the spiritual "core" to withstand the enemies darts and overcome them. Where do you stand you may ask, well, our gauge is what comes out of our mouth - fear or faith - Matt 12: 34