The amateur tweets. The pro works. - Steven Pressfield

The amateur allows his worth and identity to be defined by others. The amateur craves third-party validation. The amateur is tyrannized by his imagined conception of what is expected of him. He is imprisoned by what he believes he ought to think, how he ought to look, what he ought to do, and who he ought to be.

If you're are paralyzed with fear it's a good sign. It shows you what you have to do.

The artist committing himself to his calling has volunteered for hell whether he knows it or not.