The Mishna in Avos says:Hillel says "Be like the students of Aharon (the brother of Moshe), love peace and pursue peace"

Our Sages tell us that when Aharon HaKohen would see two men, Reuven and Shimon quarreling he would approach each one privately without the knowledge of the other party. He would tell Reuven that Shimon is extremely remorseful and pained by the fact that he wronged him. He would then turn and privately tell Shimon that Reuven is extremely remorseful and pained by the fact that he wronged him. This would plant the seed for peace and would end the dispute. When Shimon and Reuven would meet later they would embrace each other feeling that each was regretful about their actions. In this way Aharon HaKohen actively pursued peace between his fellow men.

Although his words were fabricated and normally lying would be prohibited, our Sages explain that for the purpose of peace one is allowed to "change his words". Obviously we can't always take the exact approach of Aharon, as in many cases this may make the situation worse, nevertheless we can still try to take actions to breed peace between people. Even more so we can all be mindful not to the opposite and make statements which will create hatred between two people.    

Shabbat Shalom,

Heath