The Four Foundations of Mindfulness provide a valuable exploration of the three characteristics—impermanence (annica), unsatisfactoriness (dukkha), and not self (anatta). Mindfulness practice—presence with equanimity—helps us to gain knowledge and insight that nothing can be held onto as permanent, that all experiences are ultimately unsatisfactory, and that there is no fixed self at the heart of all experience. These insights free the mind of all resistance to things being as they are.