20 For what these men are about, who will not do bodily work, to what thing they give up their time, I should like to know. “To prayers,” say they, “and psalms, and reading, and the word of God.” A holy life, unquestionably, and in sweetness of Christ worthy of praise; but then, if from these we are not to be called off, neither must we eat, nor our daily viands themselves be prepared, that they may be put before us and taken. Now if to find time for these things the servants of God at certain intervals of times by very infirmity are of necessity compelled, why do we not make account of some portions of times to be allotted also to the observance of Apostolical precepts?
For one single prayer of one who obeys is sooner heard than ten thousand of a despiser. As for divine songs, however, they can easily, even while working with their hands, say them, and like as rowers with a boat-song, so with godly melody cheer up their very toil. Or are we ignorant how it is with all workmen, to what vanities, and for the most part even filthinesses, of theatrical fables they give their hearts and tongues, while their hands recede not from their work? What then hinders a servant of God while working with his hands to meditate in the law of the Lord, and sing unto the Name of the Lord Most High? provided, of course, that to learn what he may by memory rehearse, he have times set apart.
For to this end also those good works of the faithful ought not to be lacking, for resource of making up what is necessary, that the hours which are so taken up in storing of the mind that those bodily works cannot be carried on, may not oppress with want. But they which say that they give up their time to reading, do they not there find that which the Apostle enjoins? Then what perversity is this, to refuse to be ruled by his reading while he wishes to give up his time thereto; and that he may spend more time in reading what is good, therefore to refuse to do what is read? For who knows not that each does the more quickly profit when he reads good things, the quicker he is in doing what he reads?
Source: On the Work of Monks (New Advent)