The response

We are body, soul, and spirit and not bodies with a spirit or soul dwelling in us. The former sees us as an organic unity, while the latter sees us as having an inferior part (body) and a superior part (soul, spirit). Fasting in the Bible is the organic, unified response of a whole person to a sacred moment.— Sermon on the Mount, page 201

<idle musing>
It's that nasty gnosticism sneaking into our theology again: only the spirit really matters. Wrong! We are an "organic, unified...whole person" and the sooner we adjust our theology the better. Perhaps then we won't have obese preachers who rail against other sins but ignore the sin of gluttony—just to address the most obvious example.
</idle musing>