These are small things, but over the day, day after day, they all add up. In the language of Hindu psychology, all these little moments of irritation and resentment built up into a samskara which means that they become a habitual response to everything around us. When a samskara like this becomes deeply ingrained, almost anything can trigger a hostile reaction, often without rhyme or reason. . . . That is why it is so important for all of us to learn to respond to hostility with patience and good will, and never to say or do anything that adds to this chain reaction of anger.

Eknath Easwaran, The Bhagavad Gita for Daily Living, Volume 2