Theophylact: Or else, because when they have rest from their passions, then are they made doctors to lead others to virtue, plucking away from them earthly things.
Bede: Again, they walk through the corn fields with the Lord, who rejoice in meditating upon His sacred words. They hunger, when they desire to find in them the bread of life; and they hunger on sabbath days, as soon as their minds are in a soothing rest, and they rejoice in freedom from troubled thoughts; they pluck the ears of corn, and by rubbing, cleanse them, till they come to what is fit to eat, when by meditation they take to themselves the witness of the Scriptures, to which they arrive by reading, and discuss them continually, until they find in them the marrow of love; this refreshment of the mind is truly unpleasing to fools, but is approved by the Lord.