Taking this as sympathetically as possible - which is tough - because do you really think the person you are replying to on this forum with the given response does not understand principles in the abstract?? This really is quite condescending.

The entire point of a statement like this is that debit and credit are fundamentally abstract - such that when they have no essential features above their effect on the account.

I mean did you bother to read the clarifying following sentence before you selectively quoted?