Knowledge is like a house that requires a strong foundation to be truly valuable. Without understanding the basic principles and fundamentals, the information we gather is pointless and cannot be properly utilized. Building this foundation is essential before adding the more complex or advanced parts of knowledge.
The quote emphasizes that while we may be adept at constructing the "roof"—or the more visible and impressive parts of knowledge—the real importance lies in understanding and establishing the solid base. Only then can the knowledge we gain be meaningful and effective.