"Let me rephrase these last couple of sentences without using the slightly technical term "isomorphism". When a system of "meaningless" symbols has patterns in it that accurately track, or mirror, various phenomena in the world, then that tracking or mirroring imbues the symbols with some degree of meaning - indeed, such tracking or mirroring is no less and no more than what meaning is. Depending on how complex and subtle and reliable the tracking is, different degrees of meaningfulness arise." - P-3

EDIT: I initially wrote "G.E.B." instead of "Gödel, Escher, Bach: an Eternal Golden Braid" which was too cryptic.