Challenging yourself you dip into and utilize your personal store of untapped knowledge and resources. You will not have any idea what you’re made of unless and until you venture outside of your own familiar world. Once you’ve become familiar and find out the flow with this stretch, what was unfamiliar becomes familiar. Then enjoy being in your comfort zone till you decide to step out again.
Confidence is the cornerstone for any improvement in the world. People who are confident grew up with a realistic appraisal of their abilities; this allowed them to develop a strategy and plan to strengthen themselves and to use improvements to create positive feedback that strengthens their perception they can influence the outcome, a perception that reduces pressure moments.