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 LiguoriLet us, at any rate, give heed to suffer joyfully the crosses that God sends us, because they all, if we are saved, will become for us eternal joys. When infirmities, pains, or any adversities afflict us, let us lift up our eyes to heaven and say, "One day all these pains will have an end, and after them I hope to enjoy God forever."
Alphonsus LiguoriWhen we see a beautiful object, a beautiful garden, or a beautiful flower, let us think that there we behold a ray of the infinite beauty of God, who has given existence to that object.
Alphonsus LiguoriThere is a practice that is most powerful in keeping us united with God. That practice is the constant recollection of His presence.
Alphonsus LiguoriJust as a mother finds pleasure in taking her little child on her lap, there to feed and caress him, in like manner our loving God shows His fondness for His beloved souls who have given themselves entirely to Him and have placed all their hope in His goodness.
Alphonsus Liguori