Had to think about this one while talking to a fellow sketcher today:
'Begin with a proper sketch book. Draw in ink. Finish each drawing you begin, and keep every drawing you finish. No erasing, no ripping out a page, no covering a page with angry scribbles. What you draw is an invaluable and unique representation of how you saw at that moment in that place according to your abilities. That’s all we want. We already know what a dog really looks like. I found this was a benefit that rendered the quality of my drawings irrelevant. Whether they were good or bad had nothing to do with their most valuable asset: They were a means of experiencing a place or a moment more deeply.'
— Annette Goodheart