St. Robert Bellarmine wrote a famous book, "The Art of Dying Well." Chapter 1 tells us that in order to die well, we first must live well. Chapter 2 is titled, "TO DIE TO THE WORLD." Here is an excerpt:
Now, that we may live well it is necessary, in the first place, that we die to the world before we die in the body. All they who live to the world are dead to God: we cannot in any way begin to live to God, unless we first die to the world. This truth is so plainly revealed in Holy Scripture, that it can be denied by no one but infidels and unbelievers. But, as in the mouth of two or three witnesses every word shall stand, I will quote the holy apostles, St. John, St. James, and St. Paul, witnesses the more powerful, because in them the Holy Spirit (who is the Spirit of Truth) plainly speaketh.
St. John adds also in his Epistle: "Love not the world, nor the things that are in the world. If any man love the world, the charity of the Father is not in him. For all that is in the world is the concupiscence of the flesh, and the concupiscence of the eyes, and the pride of life, which is not of the Father, but is of the world. And the world passeth away, and the concupiscence thereof. But he that doth the will of God abideth for ever."
Let us now hear how St. James speaks in his Epistle: "Adulterers, know you not that the friendship of this world is the enemy of God? Whosoever, therefore, will be a friend of the world, becometh an enemy to God."
It is our bounden and serious duty to go forth from the world, not in word and in tongue, but in deed and in truth: yea, to die to the world, and to exclaim with the Apostle, "The world is crucified to me, and I to the world." This business is no trifling matter, but one of the utmost difficulty and importance:
To live in the world, and to despise the pleasures of the world, is very difficult: to see beautiful objects, and not to love them; to taste sweet things, and not to be delighted with them; to despise honours, to court labours, willingly to occupy the lowest place, to yield the highest to all others in fine, to live in the flesh as if not having flesh…
Lord Jesus Christ, have mercy on me.