By H.H. Pope Shenouda III 
Faith Without Seeing
This faith does not depend on the senses and is consistent with what the Lord said "Blessed are those who have not seen and yet have believed." (John 20:29). It is not like the scientists who
do not believe in anything unless they get it in their laboratories and  convince themselves of it with their eyes and instruments, and not like  the Sadducees who denied the existence of the angels, the resurrection  and the spirits (Acts 23:8), because they have not seen anything from  all that...