Mark 6:51

(ubi sup.) In whatsoever heart, also, He is present by the grace of His love, there soon all the strivings of vices, and of the adverse world, or of evil spirits, are kept under and put to rest.

But the wind and the storm ceased when Jesus sat down, that is, reigned in the ship, which is the Catholic Church.

(ubi sup.) The disciples indeed, who were still carnal, were amazed at the greatness of His virtue, they could not yet however recognise in Him the truth of the Divine Majesty. Wherefore it goes on, For their hearts were hardened. But mystically, the toil of the disciples in rowing, and the contrary wind, mark out the labours of the Holy Church, who amidst the beating waves of the world, and the blasts of unclean spirits, strives to reach the repose of her celestial country. And well is it said that the ship was in the midst of the sea, and He alone on land, for sometimes the Church is afflicted by a pressure from the Gentiles so overwhelming, that her Redeemer seems to have entirely deserted her. But the Lord sees His own, toiling on the sea, for, lest they faint in tribulations, He strengthens them by the look of His love, and sometimes frees them by a visible assistance. Further, in the fourth watch He came to them as daylight approached, for when man lifts up his mind to the light of guidance from on high, the Lord will be with him, and the dangers of temptations will be laid asleep.

See again how Christ, though He was about to put an end to their dangers, puts them in greater fear. But He immediately reassured them by His voice, for it continues, And immediately he talked with them, and said unto them, It is I, be not afraid. Then by entering into the ship, the Lord restrained the tempest. For it continues, And he went up unto them into the ship, and the wind ceased.