St. John Vianney
“What should be our sentiments when assisting at Holy Mass? In the presence of a God made man, Who offers Himself mystically for our salvation, in a manner very real. Faith, hope and love, contrition for our sins, and an ardent desire to communicate with the Victim of Sacrifice, ought to fill our hearts. We find some models of these sentiments in the publican of the Gospel, in the Good Thief and the Centurion. Let us meditate on them.”
Source: St. John Vianney, The Meditations of the Curé D’Ars