I know what Chris Coleman really meant, because it's clear in his playing that we are on the same page...
...but I no longer say to people "Knowledge is power". In some other arena, that maybe true; However, in the arena of music - unless you're only interested in teaching theory, knowledge is the easy part.
If you were determined to, you could read books on basic and advanced theory in a few weeks. How long would it take you to master everything you read, though? I know a lot of people who are are EXTREMELY knowledgeable, but they're limited to being talkers, because they haven't taken the time to apply what they know.
...and that is in reference to be technically proficient. Actually developing into a musician is a something altogether different. So, with that said being said, I always tell people, "Applied knowledge is power!" The reality is, you can ready every book that ever existed on music, and never actually physically learn to play one note.
Their has to be that balance between the acquisition of knowledge, and application of said knowledge.