By H.H. Pope Shenouda III 
  The Sound Faith
How often do people believe in ideas or beliefs political or social, and  their belief gives them a power to carry these ideas out and to  transfer them to the minds of the people.
 
The sound faith that has a spiritual nature and has a deep relationship  with God "exhorting you to contend earnestly for the faith which was  once for all delivered to the saints." (Jude 3) this pure and virtuous  faith. This lets us say that Faith is not just a belief but a life... or  it is a life built on belief, or it is an experienced belief lived by  the people and not just ideas in books.