This painting has several different things going on Spiritually.  It is Christ looking at the Eucharist(a word for "Thanksgiving" which is the bread that has become the Body of Christ for consumption by the church.   Most would think of the last supper, where the Lord held up the bread for the first time, calling it His body,"which will be given up for you, and for many"...

    It has deeper meaning though...  It is also a representation of Christ's full attention on the "Body of Christ", which is the church.

Notice how he has us fully in His grasp....?

    There is a scripture in John's gospel where he stated that God had placed his disciples in His hands, and that nothing could remove them from His hands.  Thus, the church remains in His grasp, and His attention is fully on it.  He is with us, and He is IN us.  Christ the head of the Heavenly body, as well as the earthly body.  And NOTHING can take us from His hand. No height, no depth.  Neither life nor death.  Nothing can seperate us from the eternal LOVE of God.