We hear often that there is no use in working to improve our life, to fight evil, or to establish justice, because progress will occur by itself. Imagine that a boat floats along a river. Imagine that those who have sat by the oars and rowed tirelessly have stopped and gone ashore; and that the travelers who remain in the boat do not bother to take up the oars and push the boat further, but think that it will travel by itself, as before, into the future.