行百里者半九十

1.To cover 90 percent of one's destined distance brings the traveler no farther than the midway point -- the last part of an endeavor is the hardest to finish.; A thing is not done until it is done.; One must sustain one's effort when a task is nearing completion.; The ninety miles is only half of a hundredmiles journey -- the going is toughest towards the end of a journey.