When we walk in carnality we cannot please God. For the fleshly mind is against the Spiritual mind, and the spirit mind is against the fleshly mind therefore we must choose who we will follow. To be double minded cause us to be unstable in all of our ways, and we can receive nothing from God this way. God has a plan for mankind which is to walk in the spirit so that we will no longer fulfill the lust of the flesh. However the only way we can do this effectively is to allow the Holy Spirit to transform our mind daily so that we can hear clearly and won't be walking around in a state of confusion from day to day!