By H.H. Pope Shenouda III 
 
WHAT IS FAITH?
Any worshipper of God can use the word `faith' if when he does not believe in the Truth. He may have the name of a believer, but does not have the heart of one.
Faith does not automatically make you a believer if you are born a  family which believes in the existence of God. But faith has a much  deeper than this, it encompasses the whole spiritual life, performs  miracles.
At one occasion, the disciples of the Lord were unable to heal a  epileptic boy from the demon, so they asked the Lord for the reason and  He answered them "Because of your unbelief" (Matt. 17:20) and rebuked  them by saying "O faithless and perverse generation" (Matt 17:17).