Sharpness starts with making your mind sharp. This means approaching the activity of knife-sharpening with some keenness, which will include: focus, steadiness, investigation, energy, exactness, patience, concentration. To achieve sharpness, you steadily and energetically focus your attention on the activity, investigating how to do it, examining the results, adjusting your effort, patiently persevering, focusing.
— Edward Espe Brown, Tomato Blessings and Radish Teachings