A lifeguard, an undercover policeman staking out a venue where he believes his target to be, a goalkeeper. One loss of concentration for these guys and someone drowns, the target escapes, or a goal goes in. Failure.
Whereas a musician can play a wrong note or two as long as he knows how to cover it up, a teacher can tell her class an incorrect piece of information as long as she corrects it later, and a striker can miss many chances as long as he scores one.
Can you get away with making a mistake?
What would happen to your work if you told yourself you couldn’t?
If you pretended you were a lifeguard?