...the gifts of the Holy Spirit are properly seven in number to assist the seven virtues in discharging their appointed tasks. Fear leads to temperance and restrains the flesh; piety leads to true justice, knowledge to prudence, fortitude to steadfastness or patience, counsel to hope, understanding to faith, and wisdom to charity. And as "charity is the consummation and mother of all the virtues," so is wisdom of every gift.
Bonaventura, Breviloquium, Monti, tr. Franciscan Institute Publications (Saint Bonaventure, NY: 2005), p. 188-189 [Part V, Chapter 5, Section 5].