Or; That the disciples here say, It is a phantasm, figures those who yielding to the Devil shall doubt of the coming of Christ. That Peter cries to the Lord for help that he should not be drowned, signifies that He shall purge His Church with certain trials even after the last persecution; as Paul also notes, saying, “He shall be saved, yet so as by fire.” [1 Cor 3:15]
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).
Also cites: Quaest. Ev., i, 15