Catechism of the Catholic Church §1771 — excerpt
The term "passions" refers to the affections or the feelings. By his emotions man intuits the good and suspects evil.
This translation is under copyright, so only the cited words are quoted here. Follow the link for the full text. Translation: English translation of the Catechism of the Catholic Church, 2nd ed. (Libreria Editrice Vaticana), as posted at vatican.va.