Designer James Victore at 99u: 

The first level of trust is having it in yourself—trusting that your opinions matter and are valid. Even believing that your guess is as good as anyone else’s adds a level of personal trust and self-respect. This perspective, allows you the courage to crawl further out on a limb, to take chances and make sure you are not playing safe—or, worse, “giving the people what they want.” It also allows you to listen to your own opinion without the nagging voice of well wishing, but fearful friends (“You’re gonna start a business… in THIS economy?”) whose sincerest wish is to shield you from failure, while only succeeding in protecting you from success. Or, worse, to listen to the tiny critics inside your own head who concoct the wildest scenes possible of failure, carnage and financial ruin. It takes grit to stay on course, to trust yourself, your vision, your calling, and recognize this resistance for what it is: fear.

A perfect complement to the previous post.