Peace of mind is a phrase that means to be calm and peaceful, knowing who you are and staying in a state of tranquility. There are peace of mind quotes about security, relationships, and many other topics that are fun to look through. If you have a home security system installed that you trust to keep your family and possessions safe then you have peace of mind in this area. If you do not have peace of mind then you are constantly worrying about something and you may be under an incredible amount of stress as a result. Getting peace of mind may be desirable at any cost so that you can relax and spend time on other things instead of obsessing on something. Peace of mind can be hard to find or keep for some people.