Don't boast.
The Walk to Work, by Pieter Aertsen (detail)
When you brag about how kind your are or how well you do mind training, you are bolstering your sense of self. Send your practice, along with its benefits, to others.
Related instructions
Be a child of illusion
Drive all blame into one
Be grateful to everyone
Two witnesses
Behave naturally
Don't talk about others' shortcomings
Don't dwell on others' problems
Give up poisoned food
Don't turn a god into a demon
Don't expect thanks