And at last He appears quite unexpectedly: They see Jesus walking upon the sea, drawing nigh. He reappears after His retirement, teaching them what it is to be forsaken, and stirring them to greater love; His reappearance manifesting His power. They were disturbed, were afraid, it is said. Our Lord comforts them: But He saith unto them, It is I, be not afraid.
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).
Also cites: Hom. xliii. 1