The Meaning of Passions for Aquinas

Dugansick: For Aquinas, the term passion is a form of the verb pati, which is too undergo. So passions for Aquinas are something that happened to you when you experience a passionYou are acted upon by an object. They are midway between what he would call our natural appetite and our rational appetite. And it's a very important part of Aquinas' ethics to develop this control.