Former Pinner said "Action overcomes fear. Courage is acting despite the fear, not without it. Act and soon the fear will be forgotten. You are more powerful than you can possibly imagine. Action is the beginning.
Because the smarter you are, the more you're aware of how little you really know. One of life's most important lessons is to take a moment before you speak, because what is very true for a lot of people is that the smarter you get the less you speak.