St. Augustine and St. Thomas define mortal sin to be a turning away from God: that is, the turning of one's back upon God, leaving the Creator for the sake of the creature. What punishment would that subject deserve who, while his king was giving him a command, contemptuously turned his back upon him to go and transgress his orders? This is what the sinner does; and this is punished in hell with the pain of loss, that is, the loss of God, a punishment richly deserved by him who in this life turns his back upon his sovereign good.
Alphonsus LiguoriTo be silent when we are impelled to utter words injurious to God or to our neighbour, is an act of virtue; but, to be silent in confessing our sins, is the ruin of the soul.
Alphonsus LiguoriO God-Man present in this sacrament for me - what a comfort, what a privilege to know I kneel before God! And to think that this God loves me!... Mary, my mother, help me to love him in return
Alphonsus LiguoriWhat does it cost us to say: "My God help me! Have mercy on me!" Is there anything easier than this? And this little will suffice to save us if we be diligent in doing it.
Alphonsus Liguori