Scientists have discovered that large parts of the cortex of the brain process free floating, random thoughts, called mind wandering. Our mind wanders at brief intervals all through the day, and actually occupies 47 % of our waking time. This mental activity may serve important functions in processing experiences, memories and emotions in order for us to adapt to constant changes in our social environment. Mind wandering may also be an important source of creativity. A recent study shows that nondirective meditation, i.e. Acem meditation, increases the activity of the brain network that subserves mind wandering. This may be an important mechanism behind the stress relief and wellbeing resulting from practicing Acem meditation.