The Institutes, Book 7
How Hard Greed Is to Drive Out
So let no one think this evil of no account or unimportant. For just as it can easily be avoided, so, once it has taken hold of anyone, it hardly lets him reach the remedies that would cure him. It is a regular nest of sins and “a root of all kinds of evil,” and it becomes a hopeless incitement to wickedness, as the apostle says: “Greed,” that is, the love of money, “is a root of all kinds of evil.”