I was taught something similar, almost a corollary to this, when I started learning how to shoot. I was taught, "be task oriented, not goal oriented" when learning / doing a new procedure (such as reloading a shotgun). The point was that being goal oriented in such a procedure takes you out of the moment where you are, losing your awareness if you will, and makes you anxious to be at some point in the future...often with disastrous results.