About Passions

The expression in Proverbs 14:29, "Whoever is patient has great understanding, but one who is quick-tempered displays folly"; has a relation with the expression of  Tomas de Aquinas: "God is love without passion".
Passions are movements of the soul like shame, guilt, anger. In the other hand, attachments are movements of the spirit like joy, charity.
Remember that passions have their own will, which is different from reason, passions incline man to error. In the other hand, the attachments perfects the will, as for example the doctor and the love for medicine.
People affected by passions and particularly anger have a multiple personality, depending on whether they are affected by reason or passion, that is why quick tempered displays folly.
http://www.quintoevangelio.com.ar/en/articles/item/101-about-passions.html