John Chrysostom

Peter overcame that which was greater, the waves, namely, of the sea, but is troubled by the lesser, the blowing wind, for it follows, But seeing the wind boisterous, he was afraid. Such is human nature, in great trials ofttimes holding itself aright, and in lesser falling into fault. This fear of Peter shewed the difference between Master and disciple, and thereby appeased the other disciples. For if they had indignation when the two brothers prayed to sit on the right and left hand, much more had they now. For they were not yet made spiritual; afterwards when they had been made spiritual, they every where yield the first place to Peter, and appoint him to lead in harangues to the people.