"Our treasure is Christ"
"Earthly goods are not bad, but they are debased when man sets them up as idols, when he adores them. They are ennobled when they are converted into instruments for good, for just and charitable Christian undertakings. We cannot seek after material goods as if they were a treasure. Our treasure is Christ and all our love and desire must be centered on him." (Christ is passing by, 35)
If you want to be your own masters at all times, I advise you to make a very real effort to be detached from everything, and to do so without fear or hesitation. Then, when you go about your various duties, whether personal, family or otherwise, make honest use of upright human means with a view to serving God, his Church, your family, your profession, your country, and the whole of mankind. Remember that what really matters is not whether you have this or lack that, but whether you are living according to the truth taught us by our Christian faith, which tells us that created goods are only a means, nothing more. So, do not be beguiled into imagining that they are in any way definitive.
When a man tries to build his happiness exclusively around the things of this world, and in this I have witnessed some real tragedies, he perverts their proper use and destroys the order so wisely established by the Creator. As a consequence the heart is left sad and unsatisfied. It starts following paths which lead to everlasting unhappiness and it ends up, even in this world, a slave, the victim of the very same goods which had perhaps been gained at the cost of countless efforts and renunciations. But, above all, I recommend you never to forget that God cannot find a place, that he cannot dwell in a heart which is bogged down by a coarse, disorderly and empty love. (Friends of God, 118)
If you are a man of God, you will seek to despise riches as intensely as men of the world seek to possess them. (The Way, 633)
Rather than in not having, true poverty consists in being detached, in voluntarily renouncing one's dominion over things.
That is why there are poor who are really rich. And vice-versa. (The Way, 632)