John Chrysostom
They did not say this simply, but in order to prevent Him from going there. "You say," they object, "that he is sleeping? Then there is no special need to go there." Yet He had said "our friend" precisely to show the necessity of going.
The disciples, not suspecting the hidden meaning of His words, say to Him, "Lord, if he has fallen asleep, he will recover." For sleep is considered a natural medicine for the sick.
When the disciples heard this, they said, "Lord, if he has fallen asleep, he will recover." They judged not according to piety, but from a medical point of view. Sleep is indeed harmful to those sinking into lethargy, yet in some illnesses it relieves more than perspiration.