Sometimes people take offense about "acting the part," as if doing so means that they are fakes. Anyone who has children knows parenting is a fake-it-til-you-make-it experience. Surely confidence deserves the same pass.
One CEO told me, "I still doubt myself every single day. I've had painful situations, times when it was really tough. What people believe is my self-confidence is actually my acting in reaction to fear."
When you decide to be determined, then turn up the juice. Go further, and get into your
Do the scary. Face fears. Bad things that might possibly happen are worse in your head than in actuality. Failure will not kill you. It may make you sick for a while, but that is often your own doing in your head, too.