3 You have with you one who was once your partner in the flesh but is now your partner in the spirit; once your wife but now your sister; once a woman but now a man; once an inferior but now an equal. Under the same yoke as you she hastens toward the same heavenly kingdom.
A too careful management of one's income, a too near calculation of one's expenses— these are habits not easily laid aside. Yet to escape the Egyptian woman Joseph had to leave his garment with her. And the young man who followed Jesus having a linen cloth cast about him, when he was assailed by the servants had to throw away his earthly covering and to flee naked. Elijah also when he was carried up in a chariot of fire to heaven left his mantle of sheepskin on earth. Elisha used for sacrifice the oxen and the yokes which hitherto he had employed in his work. We read in Ecclesiasticus: “he that touches pitch shall be defiled therewith.” As long as we are occupied with the things of the world, as long as our soul is fettered with possessions and revenues, we cannot think freely of God. “For what fellowship has righteousness with unrighteousness? And what communion has light with darkness? And what concord has Christ with Belial? Or what part has he that believes with an infidel?” “You cannot,” the Lord says, “serve God and Mammon.” Now the laying aside of money is for those who are beginners in the way, not for those who are made perfect. Heathens like Antisthenes and Crates the Theban have done as much before now. But to offer one's self to God, this is the mark of Christians and apostles. These like the widow out of their penury cast their two mites into the treasury, and giving all that they have to the Lord are counted worthy to hear his words: “ye also shall sit upon twelve thrones judging the twelve tribes of Israel.”
Source: Letters (New Advent)