Luther

“But it is the way of Christians to judge according to faith. Therefore, in obeying commandments nothing else should be regarded than the form of the precept and the intention of him who commands. No regard should be paid to whether the works are trivial or important, worthless or worthwhile, many or few, of a short or a long duration, or of whatever form they take or whatever name they bear. For it is not the work as such which God commands, but obedience in the work, or, as Scripture expresses it, 'Obedience not sacrifice.'” Martin Luther, Judgment of Martin Luther on Monastic Vows, LW, AE, 44:349