Have you declined to try something new? Was it because you doubted your ability?
Won’t enrol for that course, learn that new skill, apply for that job, because you doubt your chances?
Readers Digest Australia (June 2015) reports that Lauren Kornacki, a 23 year old college graduate found her father crushed under his car which had fallen off its jack. Spontaneously she reached under the wheel hub and pulled. The car lifted! She held it with one hand and, with the other, pulled her father out from underneath by his leg.
Her father was seriously injured but recovered.
Did Lauren stop to decide whether or not she had the strength? No. She just did what had to be done and saved her father.