Augustine of Hippo

We speak of "nature" in two ways. When we are speaking strictly of nature itself, we mean the nature in which humanity was originally created—after God's own image and without fault. The other way we speak of nature refers to that fallen sin nature, in which we are self-deceived and subject to the flesh as the penalty for our condemnation. The apostle adopts this way of speaking when he says "for we were by nature children of wrath, like the rest."