Now the Apostle, under the inspiration of the Holy Spirit, says, "Knowledge inflates: but love edifies." The only correct inerpretation of this saying is that knowledge is valuable when charity informs it. Without charity, knowledge inflates; that is, it exalts man to an arrogance which is nothing but a kind of windy emptiness.
For I wondered that others, subject to death, did live, since he whom I loved, as if he should never die, was dead; and I wondered yet more that myself, who was to him a second self, could live, he being dead. Well said one of his friend, "Thou half of my soul"; for I felt that my soul and his soul were "one soul in two bodies": and therefore was my life a horror to me, because I would not live halved. And therefore perchance I feared to die, lest he whom I had much loved should die wholly.
Though there are very many nations all over the earth, ...there are no more than two kinds of human society, which we may justly call two cities, ...one consisting of those who live according to man, the other of those who live according to God ....To the City of Man belong the enemies of God, ...so inflamed with hatred against the City of God.
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.
The measure of charity may be taken from the want of desires. As desires diminish in the soul, charity increases in it; and when it no longer feels any desire, then it possesses perfect charity.