saw him walking on the sea] Not standing onely on it, which yet was more then could by humane strength be done, but walking up and down, as on dry ground.
they were troubled] For they had never seen the like before. They feared this apparition more then the storm.
It is a spirit] The Greek word signifieth, that which a man imagineth to himself vainly in his minde, perswading himself that he seeth something, when he seeth nothing. An apparition.