Inner peace (also known as peace of mind) refers to a deliberate state of psychological or spiritual calm maintained despite the presence of stressors. It is associated with a state of psychological "homeostasis" and the opposite of being stressed or anxious, and is considered to be a state where one's mind performs at an optimal level, regardless of outcomes. Peace of mind is thus generally associated with a state of contentment and emotional well-being including bliss, happiness and contentment.
Peace of mind, serenity, and calmness are descriptions of a disposition free from the effects of stress. In various cultural traditions, inner peace is regarded as a state of consciousness attainable through practices such as breathing exercises, prayer, meditation, tai chi or yoga. Many spiritual practices refer to this peace as an experience of knowing oneself.