Well, I did use that phrase a few times...but keep in mind medical school is not the same thing as mathematics or physics where understanding is everything, but there is a good amount you can gain from understanding.
(Optional) Physiology: Costanzo. A good book written in prose to emphasize explanations.
(Core resource) UWorld: A QBank to both assess what you don't know and then have an explanation why 4 other answers (diagnoses) are not right simultaneously explaining 5 topics to your.
(Core resource)Pathoma: Video+Book series to explain Pathology which is the basis of disease as well as going into the Pathophysiology of some areas like the Lung.
(Core resource)Beyond the Boards: Similar to Pathoma, but for normal topics like Biochem, etc.
It fits neatly really. 3 core resources emphasize understanding, 3 are there to drill things down (First Aid, Zanki, and Sketchy). Of course, there's some overlap between. Refer to the guide in my signature to see how and WHEN I used these.