By Richard Van Kirk, Catholic Stand - The greatest stumbling block to following Christ is found in the Gospel of John, Chapter 6. The central matter of this chapter is “The Bread of Life Discourse,” which begins at verse 22 and extends to verse 71, the end of the long chapter. In the first twenty-one verses, Jesus multiplies the loaves and walks on the water, setting up St. John’s teaching on the Eucharistic.