And the virtue of justice? What does that have to do with fortitude? St Thomas says of justice that it is ‘…the lasting and constant will [to] render each his due’ (S. T., II, II, 58,1). Fortitude stands firm against whatever threatens a value. That valued thing might exist on a world scale, such as the freedom of our country, or on a personal scale, such as my right to a just wage; or on any other scale you choose, but the key word is value. By the virtue of justice, we become able to recognise what is of true value, and honour it by a certain kind of commitment to it, as appropriate. By the virtue of justice, in other words, we are able to identify what is worth the kind of self-dedication that fortitude requires.
Which brings us to the consideration of St. Thomas’s teaching on the chief “act” of fortitude. For him, fortitude is about endurance. This may be surprising. Perhaps we expected fortitude to issue in a big display of obvious power directed against something big and bad. How does endurance figure into fortitude? St. Thomas explains that endurance is “an action of the soul cleaving resolutely to good, the result being that it does not yield to fear” (S. T. II, II, 123, 6). Endurance, then, in “cleaving resolutely” to something, implies length of time. We don’t have to cleave resolutely when the difficulty disappears quickly. Resolute cleaving is only necessary when we have a difficulty that doesn’t go away.
So we see here that first of all, fortitude is a virtue for the long haul. Fortitude is what comes into play for situations that require time in order to achieve their fulfilment. Take something like marriage. The wedding day is not the fulfilment of the marriage vows. It is the golden anniversary that fulfils what the couple set out to do and become when they made their commitment to each other. In the meantime, fortitude is what helps them to weather the storms that are inevitable in a relationship between two fallible beings; it helps them to learn from their mistakes, admit their share in them, say ‘Sorry,’ and start again.
For further study:
The Catechism of the Catholic Church ,Geoffrey Chapman, London, 1994
The Four Cardinal Virtues, Joseph Pieper, University of Notre Dame Press