Inspirational quotes are known for having a unique way of being able to keep a person grounded and focused on the things of life that are most important. When a quote is read that a person is able to relate to, it often helps them put the things of importance back into perspective as they realize there are others that have been through the very same things. This is exactly why there are so many men and women that begin each of their days reading a quote of inspiration, as they work fantastic for promoting a more positive way of thinking.
Reference.com Definition of Inspirational
Inspirational on Wikipedia.org