"Knowledge is only potential power"
Knowledge is not power. It is not enough to simply know something, it is almost useless if you don't apply it or use what you know to move forward. The application of knowledge is power. Keep learning, keep educated yourself on your field, become an expert yet remain a student of your domain. If you are not at the top of your field yet, use what you learn to get you there. Don't keep all your information inside.
On a personal note, this was a wake up call for me. I have many certifications in my field yet I don't showcase my learnings. From now on, I'll be using MY knowledge and MY education more often.
Do you use what you know?
"Too many of those who begin at the bottom never manage to lift their heads high enough to be seen by opportunity, so they remain at the bottom"