It’s processing your life. It activates when we daydream, during certain kinds of meditation, and when we lie in bed before going to sleep. This is the system for self-reflection, and reflection about others, the area of the brain that is highly active when we are not focused on a task. It is the part of us that goes “off-line.” A healthy default mode network is necessary for the human brain to rejuvenate, store information in more permanent locations, gain perspective, process complicated ideas, and be truly creative.

