I’m not talking about craft; that goes without saying. The professional is prepared at a deeper level. He is prepared, each day, to confront his own self-sabotage.
The professional understands that Resistance is fertile and ingenious. It will throw stuff at him that he’s never seen before.
The professional prepares mentally to absorb blows and to deliver them. His aim is to take what the day gives him. He is prepared to be prudent and prepared to be reckless, to take a beating when he has to, and to go for the throat when he can. He understands that the field alters every day. His goal is not victory (success will come by itself when it wants to) but to handle himself, his insides, as sturdily and steadily as he can.
- Steven Pressfield, The War of Art