St. John Vianney
“A Christian on leaving the holy place moved by the holy thoughts that have been aroused in him by the sight of the ceremonies he has seen, and the prayers that he has said, ought to say to himself: ‘I have just come from assisting at Holy Mass, a God has immolated Himself for me; He has shed His Blood for the salvation of our souls; what more could He do? Oh! how miserable I am, I who for so many years have refused Him my heart, which He has created for Himself and which He asks of me only in order to make it happy. I have just celebrated the praises of God with this same mouth that I had often sullied by all sorts of sins. Oh! my God, shall I always then beg from creatures the peace they are powerless to give me! My tongue shall it serve sometimes to praise You, sometimes to mispraise You. No, Lord, I now wish only to bless and to love You.'”
Source: St. John Vianney, The Meditations of the Curé D’Ars