Excess of pride, excess in speech, excess in eating, anger, the desire of enjoyment, and intestine dissensions,—these, O king, are six sharp swords that cut off the period of life allotted to creatures. It is these which kill men, and not death. Knowing this, blessed be thou!

In plain words: Vidura tells the king that six things are like sharp swords that shorten life: too much pride, too much talking, overeating, anger, craving pleasure, and fighting within the family. He says these kill people, not death itself.