Mark 6:31

(ubi sup.) How arose the necessity for giving rest to His disciples, He shows, when He adds, For there were many coming and going, and they had no leisure so much as to eat; we may then see how great was the happiness of that time, both from the toil of the teachers, and from the diligence of the learners. It goes on, And embarking in a ship, they departed into a desert place privately. The disciples did not enter into the ship alone, but taking up the Lord with them, they went to a desert place, as Matthew shows. (Matt. 14) Here He tries the faith of the multitude, and by seeking a desert place He would see whether they care to follow Him. And they follow Him, and that not on horseback, nor in carriages, but laboriously coming on foot, they show how great is their anxiety for their salvation. There follows, And the people saw them departing, and many knew him, and ran afoot thither out of all cities, and outwent them. In saying that they outwent them on foot, it is proved that the disciples with the Lord did not reach the other bank of the sea, or of the Jordan, but they went to the nearest places of the same country, where the people of those parts could come to them on foot.

(in Marc. 2, 25) Leaving also Judæa, the holy preachers, in the desert of the Church, overwhelmed by the burden of their tribulations amongst the Jews, obtained rest by the imparting of the grace of faith to the Gentiles.

Again, He goes into a desert place from His humility. But Christ makes His disciples rest, that men who are set over others may learn, that they who labour in any work or in the word deserve rest, and ought not to labour continually.

Mystically, however, the Lord took apart those whom He chose, that though living amongst evil men, they might not apply their minds to evil things, as Lot in Sodom, Job in the land of Uz, and Obadiah in the house of Ahab. Little indeed is the rest of the saints here on earth, long is their labour, but afterwards, they are bidden to rest from their labours. But as in the ark of Noah, the animals that were within were sent forth, and they that were without rushed in, so is it in the Church, Judas went, the thief came to Christ. But as long as men go back from the faith, the Church can have no refuge from grief; for Rachel weeping for her children would not be comforted. Moreover, this world is not the banquet, in which the new wine is drank, when the new song will be sung by men made anew, when this mortal shall have put on immortality.

(ubi sup.) Not only do the Apostles tell the Lord what they themselves had done and taught, but also his own and John's disciples together tell Him what John had suffered, during the time that they were occupied in teaching, as Matthew relates. It goes on: And he said to them, Come ye yourselves apart, &c.