There are two other similar quotes that I also like. The first is from Arthur Conan Doyle via Sherlock Holmes. "It is a capital mistake to theorize before one has data. Insensibly, one begins to twists facts to suit theories instead of theories to suit facts." The second has been attributed to various people but with no factual attribution. "in theory, theory and practice are the same. In practice, they are not."
All models have limitations. It is very important to understand the limitations of a model before using it. A model is a tool. In the hands of a skilled craftsman it is very useful. It is not nearly as useful in the hands of a novice. Understanding the technology being modeled and the limitations of the model are more important than understanding how to use the model.