行百里者半九十

行百里者半九十 [xíng bǎi lǐ zhě bàn jiǔ shí]

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 hundred miles journey -- the going is toughest towards the end of a journey.