When you want to describe a person in a creative way, you can use a phrase like this:

You have the patience of a saint.

"You have the ___ of ___" means that the listener has the same amount of some quality as someone or something else. In this case, the speaker means that the listener is very patient, like a saint would be. Here are some other examples:

He has the strength of a lion.

You have the financial disciplne of a 19-year-old high school dropout