The body rules the mind in that the body is the ruler and the mind is the subject. The body wants, or doesn't, and the mind scrambles to make a sensible story of it, a reason for it. The mind is subjected to the body. Yes, the body is also subjected to the mind, but it's the mind that actually serves the body slavishly.
That's my answer anyway, given idly, on the condition that we have 'nothing but time'.
xo, math+