Pulpit Commentary:" It was not their wish to leave him, especially when the multitudes seemed likely to elect him king (John 6:15). But from the temptation to side with the multitudes our Lord desired now to shield them. Separation and physical work (ver. 24) would calm their excitement, and the object lesson that their Master already ruled over wind and sea would lead them to more perfect trust in his methods. Another reason for his sending them forward may have been that they should use the failing light; and yet another, that he himself desired time for prayer."