When they found him on the other side of the sea, they asked him, "Rabbi, when did you come here?"

 Jesus was walking epi tes thalasses, by the seashore. The toiling disciples looked up, and suddenly saw him. It was all so unexpected, they had been bent so long over their oars, that they were alarmed because they thought it was a spirit they were seeing. Then across the waters came that well-loved voice--"It is I; don't be afraid." They wanted him to come on board; the Greek most naturally means that their wish was not fulfilled. Why? Remember the breadth of the lake was four miles and they hid rowed about that distance. The simple reason was that, before they could take Jesus on board, the boat grounded on the shingle, and they were there. 