The Rule of St. Benedict - Chapter 5. Obedience

(14) This very obedience, however, will be acceptable to God and agreeable to men only if compliance with what is commanded is not cringing or sluggish or half-hearted, but free from any grumbling or any reaction of unwillingness.
(15) For the obedience shown to superiors is given to God, as he himself said: "Whoever listens to you, listens to me," (Luke 10:16).
(16) Furthermore, the disciples' obedience must be given gladly, for, "God loves a cheerful giver," (2 Cor 9:7).
(17) If a disciple obeys grudgingly and grumbles, not only aloud but also in his heart,
(18) then, even though he carries out the order, his action will not be accepted with favor by God, who sees that he is grumbling in his heart.
(19) He will have no reward for service of this kind; on the contrary, he will incur punishment for grumbling, unless he changes for the better and makes amends.

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