9 You say to me, perhaps: In circumstances so difficult, what do you wish me to do? If you ask counsel of me in a worldly point of view how your safety in this transitory life may be secured, and the power and wealth belonging to you at present may be preserved or even increased, I know not what to answer you, for any counsel regarding things so uncertain as these must partake of the uncertainty inherent in them. But if you consult me regarding your relation to God and the salvation of your soul, and if you fear the word of truth which says: “What is a man profited, if he shall gain the whole world, and lose his own soul?” I have a plain answer to give.
I am prepared with advice to which you may well give heed. But what need is there for my saying anything else than what I have already said. “Love not the world, neither the things, that are in the world. If any man love the world, the love of the Father is not in him. For all that is in the world, the lust of the flesh, and the lust of the eyes, and the pride of life, is not of the Father, but is of the world. And the world passes away, and the lust thereof: but he that does the will of God abides forever.” Here is counsel!
Seize it and act on it. Show that you are a brave man. Vanquish the desires with which the world is loved. Do penance for the evils of your past life, when, vanquished by your passions, you were drawn away by sinful desires. If you receive this counsel, and hold it fast, and act on it, you will both attain to those blessings which are certain, and occupy yourself in the midst of these uncertain things without forfeiting the salvation of your soul.
Source: Letters (New Advent)