knowledge is power. But ultimately, it is worthless in the hands of someone who doesn't know how to wield it, or when to wield it.
It is true that knowledge is power. But it is also very true that we have to have the knowledge of how to use this knowledge. It is also important to master the technique of how to apply it.
I often think about how much I "know" on a topic, and how useless it is if I can't apply it. Often, we seem to learn a lot, but don't know enough to make it useful. It is like building a car, but not having any fuel to run it.