The Buhha was a monastic, but the practice of mindfulness in the context of any lifestyle is one of renunciation. Every moment of mindfulness renounces the reflexive, self-protecting response of the mind in favor of clear and balanced understanding. In the light of the wisdom that comes from balanced undertanding, attachment to having things be other than what they ar falls away.
The natural alone is permanent. Fantastic idols may be worshipped for a while; but at length they are overturned by the continual and silent progress of Truth, as the grim statues of Copan have been pushed from their pedestals by the growth of forest-trees, whose seeds were sown by the wind in the ruined walls.