The mind as a muscle
Exercising it hurts just as much
The essential tool with which to build things is your mind. Using and strengthening it hurts as much as using and strengthening other parts of your body. And as you progress, the stretching pain of improvement will stay.
– iA, “Putting Thought Into Things”
This notion of the mind as a muscle reminds me of the subtitle to David Eaves’s blog: “if writing is a muscle, this is my gym”.