Thomas Aquinas

“ Fortitude, as a virtue, perfects the mind in the endurance of all perils whatever; but it does not go so far as to give confidence of overcoming all dangers: this belongs to the fortitude that is a gift of the Holy Ghost. ”

“ The gift of fortitude regards the virtue of fortitude not only because it consists in enduring dangers, but also inasmuch as it consists in accomplishing any difficult work. Wherefore the gift of fortitude is directed by the gift of counsel, which seems to be concerned chiefly with the greater goods. ”

“ The gifts have not the same acts in heaven as on the way: for they exercise acts in connection with the enjoyment of the end. Hence the act of fortitude there is to enjoy full security from toil and evil. ”