The Virtues laid out by Aristotle and Plato:
Chastity (purity)
Temperance (self-control)
Charity (generosity)
Diligence (effort)
Patience (peace)
Kindness (satisfaction)
Humility (modesty)
Justice (fairness)
These were modified by the Catholic church into four Cardinal virtues: Prudence, Justice, Restraint, and Courage, and three Theological virtues: Faith, Hope and Charity.
The virtue of Faith is based on how well you believe.
What @archaeopteryx is defining as “faith” is not faith per se, but recognition of the intellectual shortcomings of man to understand everything about the world around him, and his origins. Religion developed as a way to explain the unexplainable.
Faith and Belief are two different things. You should strive for faith if your consider yourself a religious person. If you’re not sure, there are plenty of classics to read to help you decide. Start with Plato and Aristotle, and work forward.
You can’t “have” faith any more than you can “have” patience. Either you “are” faithful or you “are” patient. They are not things that you adhere to, but are active states that you are or strive to achieve. They are ways of being.