Pirkei Avot §avot_05_11: There are four kinds of temperaments: Easy to become angry, and easy to be ap...

There are four kinds of temperaments: Easy to become angry, and easy to be appeased: his gain disappears in his loss; Hard to become angry, and hard to be appeased: his loss disappears in his gain; Hard to become angry and easy to be appeased: a pious person; Easy to become angry and hard to be appeased: a wicked person.