quia vobis donatum est pro Christo, non solum ut in eum credatis, sed ut etiam pro illo patiamini
Phil. i. xxix.
Another time that Columcille was in Iona, he gathered the monks to him in the place where he was, and he spake to them and said:
“Today I am going,” saith he, “to the western part of this island on a certain errand, and let no man at all follow me.”
And the monks consented. And he went forth then to the place whither he had declared he would go. Howbeit there followed him, without his knowing, a certain monk that would fain learn the reason of his going into that solitary place. And he concealed himself in a hillock overlooking the place where Columcille was. And from thence he had sight of him. And thus it was he beheld him, in cross vigil, and his face turned upward toward Heaven, and praying God fervently, and legions of angels round about him on every side. For it was a custom of the angels to come to bring solace to Columcille when he was worn out with pious exercise in places chill and comfortless, or with standing in water to his chin, saying very long prayers in wintry weather or snowy, or from passing strong constraint that he put upon his body for lack of food and drink.
And this is the cause why God gave the monk the sight of the angels: to magnify the name of Columcille. And Columcille would not magnify it himself by letting men wit the visions that were given him. For in fear of feeling empty vanity he never made them known save he understood that to others beside himself there was need of disclosing them — as to pray for the soul of one that had died, or for those that were in peril on sea or land, or when to reveal them would increase the name or honor of some other holy man.
And when Columcille had finished his prayers, the angels left him; and he returned again to the monastery. And he gathered the brethren to him, and asked them which of them had followed him against the command he had laid upon them. And the monks that were innocent said that they knew naught thereof. When the monk that had followed him heard this, he fell on his knees before Columcille, and said that he had done a great sin, and begged forgiveness of Columcille therefor. And Columcille forgave him this when he saw his humility and contrition. And after this Columcille took that monk with him to a place apart, and required him so long as he should live not to relate to any one the angelic vision he had seen. And when Columcille died, the monk disclosed to the brethren the vision he had seen, so that the names of God and Columcille were magnified thereby. And in proof thereof, the Hillock of the Angels is to this day the name of the hillock where the monk saw the angels around Columcille.
— Betha Colaim Chille, 229.