Chapter 5: Monastic obedience (paragraph 4)

We should remember, however, that such obedience will be acceptable to God and rewarding to us, if we carry out the orders given us in a way that is not fearful, nor slow, nor half-hearted, nor marred by murmuring or the sort of compliance that betrays resentment. (From para. 4 of Ch. 5 of Saint Benedict's Rule, trans. by Patrick Barry, OSB, 1997.)

I think that in the way St. Benedict describes carrying out obedience, he almost describes obedience itself. I believe that an open, responsive heart is grounded in Christ and not marred by resentment.