Inc.com: “I’m convinced that confidence does not come from any inherent traits, your education level, or even what you look like in a mirror. Confidence is a decision you make…when you get up in the morning, when you arrive at work, when you walk into a meeting. You decide to be confident, and those who excel in their jobs are the ones who make that decision every single day. ”

https://www.inc.com/john-brandon/your-confidence-level-will-determine-your-ultimate-success.html