Galatians 5:14-17

14 For the whole law is fulfilled in one word, in this: "You shall love your neighbor as yourself."  15 But if you bite and devour one another, be careful that you don't consume one another.  16 But I say, walk by the Spirit, and you won't fulfill the lust of the flesh.  17 For the flesh lusts against the Spirit, and the Spirit against the flesh; and these are contrary to one other, that you may not do the things that you desire.