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Serenity of mind, good-heartedness, self-control, purity of nature this is called mental austerity.

Serenity of mind, gentleness, silence, self-control and purity of feeling: this is called austerity of the mind.

Austerity of the mind includes calm and clarity, gentleness, silence or restraint of inner chatter (mauna), self-mastery, and purity of one's feelings and intentions. This is the most inward form of discipline. While bodily and verbal austerity can be seen by others, mental austerity is known mainly to oneself. Together the three verses on austerity describe a person who is respectful in action, careful in speech and peaceful in mind, an ideal that fits a householder as much as a hermit.