nisaba
Strength is Fortitude which in English might be called "courage," and it's one of the "cardinal virtues (along with Temperance, Justice, Prudence, although this list can vary a little).
... which has often made me wonder, given that the Mediaeval mind thought in sets and the deck is full of sets (emperor and empress, sun, moon and star, pope and papess, etc), whether there wasn't originally a set of Fortitude, Temperance, Justice and Prudence, and us moderns have lost the Prudence card after the ancient Italian period and before the Marseilles period.
And that makes me wonder what other cards or sets-of-cards we've lost.