The Virtue of Faith is the last one of the theological virtues, standing for the Faith in God. A sceptic might note that faith is belief in something for which there is no sufficient evidence, or else we wouldn't need faith. Anyhow, faith is also a form of trust and as such a fairly good thing.
Like its theological sisters, Fide/Faith did not find its way into the traditional Tarot decks, but is present in the Minchiate decks.