This is from a larger comic about creativity: https://theoatmeal.com/comics/creativity_things
Eight marvelous and melancholy things I've learned about creativity - The Oatmeal

A 10 minute read.

The Oatmeal
@oatmeal @SusanAShriner I was curious, so I followed the link to the first chapter: Erasers. Glad I did. Now I don’t feel so self-flagellated about using erasers in my artwork. (Oh no! I can’t get rid of the pencil lines! 😲)