I have had a very difficult time with stage fright; it undermines your well-being and peace of mind, and it can also threaten your livelihood.
Most professional players are their own biggest critics. Some of the things you read in the papers that strike you as bang out of order will already have been thought by the players themselves.
When I'm sitting in the church alone, I can hear singing of the old people. I can hear their singing and I can hear their praying, and sometimes I hum one of their songs.