Baptism does not profit a man outside unity with the Church ... For many heretics also possess this Sacrament but not the fruits of salvation ... The benefits which flow from Baptism are necessarily fruits which belong to the true Church alone. Children Baptized in other communions cease to be members of the Church when, after reaching the age of reason, they make formal profession of heresy, as, for example, by receiving communion in a non-Catholic Church.
The entire life of a good Christian is in fact an exercise of holy desire. You do not yet see what you long for, but the very act of desiring prepares you, so that when he comes you may see and be utterly satisfied.
It is salutary for us to learn to hold cheap such things, be they good or evil, as attach indifferently to good men and bad, and to covet those good things which belong only to good men, and flee those evils which belong only to evil men.
It is said that there is no salvation outside the Church. Who denies this? And therefore whatever things of the Church are had outside the Church do not avail unto salvation.
When the king asked him what he meant by infesting the sea, the pirate defiantly replied:
The same as you do when you infest the whole world;
but because I do it with a little ship I am called a robber,
and because you do it with a great fleet, you are an emperor.
Two loves have made two different cities: self-love hath made a terrestrial city, which rises in contempt of God; and Divine Love hath made a celestial one, which rises in contempt of self. The former glories in itself - the latter in God.