Mindfulness is the practice of purposely bringing one's attention in the present moment without evaluation, a skill one develops through meditation or other training. Mindfulness derives from sati, a significant element of Buddhist traditions, and is based on Zen, Vipassanā, and Tibetan meditation techniques. Though definitions and techniques of mindfulness are wide-ranging, Buddhist traditions explain what constitutes mindfulness such as how past, present and future moments arise and cease as momentary sense impressions and .