((There is no mention of sacred heart of Jesus in the bible, therefore....))
Actually there is quite a discussion of the actions of the heart of God.
Jesus personifies that heart.
The only thing the Catholic Church does is highlight it and give it a title.
It is not made up from thin air.
http://www.catholicculture.org/culture/liturgicalyear/activities/view.cfm?id=1098
Well actually it is. Names and titles are very important to God so for the Catholic church to make them up all the time and build religion around them is certainly the opposite of finding the Word of God sufficient.
While Protestants understand this I'm not so sure many Catholics do...The heart of Jesus had one function and that was to pump blood to the body...It's just an organ...I am troubled that you guys present drawings of Jesus with a superimposed heart or a beam of light centering on the heart...The heart of Jesus is no more or less sacred than the rest of him...
The reference to the heart of Jesus is symbolic, a metaphor...