They explained in Avot DeRabbi Natan how Aharon loved peace: When he would see two people quarreling, he would go to each one of them without the knowledge of his fellow and say to him, “Behold how your fellow is regretting and afflicting himself that he sinned against you; and he told me that I should come to you so that you will forgive him. And as a result of this, when they bumped into each other, they would kiss each other