Augustine, the early church father (354-430 A.D.), was on of the most significant theologians in all of church history. In this post I have selected a number of quotes from a few different works.
“Hence it is not the case that every bad man will become good, but no one will be good who was not bad originally.”
“He that becomes protector of sin shall surely become its prisoner.”
“It is this Good which we are commanded to love with our whole heart, with our whole mind, and with all our strength. It is toward this Good that we should be led by those who love us, and toward this Good we should lead those whom we love. In this way, we fulfill the commandments on which depend the whole Law and the Prophets: ‘Thou shalt love the Lord Thy God with thy whole heart, and thy whole soul, and with thy whole mind’; and ‘Thou shalt love thy neighbor as thyself.’ For, in order that a man might learn how to love himself, a standard was set to regulate all his actions on which his happiness depends. For, to love one’s own self is nothing but to wish to be happy, and the standard is union with God. When, therefore, a person who knows how to love himself is bidden to love his neighbor as himself, is he not, in effect, commanded to persuade others, as far as he can, to love God?”
“Now the Apostle, under the inspiration of the Holy Spirit, says, “Knowledge inflates: but love edifies.” The only correct interpretation 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.”