Today is the feast of St. Cyril of Jerusalem, Doctor of the Church. From his Catechetical Lectures (5.3):
Nor is it only among us, who bear the name of Christ, that the dignity of faith is great : but likewise all things that are accomplished in the world, even by those who are aliens from the Church, are accomplished by faith.
By faith the laws of marriage yoke together those who have lived as strangers: and because of the faith in marriage contracts a stranger is made partner of a stranger's person and possessions. By faith husbandry also is sustained, for he who believes not that he shall receive a harvest endures not the toils. By faith sea-faring men, trusting to the thinnest plank, exchange that most solid element, the land, for the restless motion of the waves, committing themselves to uncertain hopes, and carrying with them a faith more sure than any anchor. By faith therefore most of men's affairs are held together: and not among us only has there been this belief, but also, as I have said, among those who are without. For if they receive not the Scriptures, but bring forward certain doctrines of their own, even these they accept by faith.
