Fortitude is the ability to persevere in times of trial and tribulation -- the ability to hang in there when the going gets tough. It's courage to do the right thing no matter what the cost.Recommended reading: Back to Virtue by Peter Kreeft. He examines the virtues in depth and also looks specific virtues and Beatitudes as antidotes to each of the seven deadly sins. Not a new concept but one that he writes about superbly (as always).
It's not enough to be fair, use self-control, and be prudent and know what, when, and how to do something. The virtue gives you the strength to fulfill your commitments to God, family,and friends...
When practiced faithfully and consistently, fortitude empowers people to remain courageous and overcome even the fear of death in order to help others and/or do the right thing for the right reason.
Catholicism For Dummies by John Trigilio
Next, we'll look at the seven deadly sins, including how the virtues counteract them.