2MCP 410.1
(Mind, Character, and Personality Volume 2 410.1)
You may look surprised at this, but it is a species of swearing to be constantly irritated and irritating others by your faultfinding and gloomy reflections. These fits of indigestion are trying, but hold fast to the bridle that you will not swear to those who are your best friends or to those who are your enemies.—Letter 11, 1897. (2MCP 410.1) MC VC