Everyone who observes himself doubting observes a truth, and about that which he observes he is certain; therefore he is certain about a truth. Everyone therefore who doubts whether truth exists has in himself a truth on which not to doubt.... Hence one who can doubt at all ought not to doubt the existence of truth.
What difference, if you are mistaken? For if I am mistaken, I am. For he who is not, assuredly cannot be mistaken; and therefore I am, if I am mistaken. Therefore because I am if I am mistaken, how am I mistaken that I am, when it is sure that I am, if I am mistaken.
What then, is correctness of speech but the maintenance of the practice of others, as established by the authority of ancient speakers? But the weaker men are, the more they are troubled by such matters. Their weakness stems from a desire to appear learned, not with a knowledge of things, by which we are edified, but with a knowledge of signs, by which it is difficult not to be puffed up in some way; even a knowledge of things often makes people boastful, unless their necks are held down by the Lord's yoke.
It is impossible that there should be inhabitants on the opposite side of the Earth, since no such race is recorded by Scripture among the descendants of Adam.
Our bodies are shaped to bear children, and our lives are a working out of the processes of creation. All our ambitions and intelligence are beside that great elemental point.
I was unhappy and so is every soul unhappy which is tied to its love for mortal things; when it loses them, it is torn in pieces, and it is then that it comes to realize the unhappiness which was there even before it lost them.
They who shall enter into [the] joy [of the Lord] shall know what is going on outside in the outer darkness. . .The saints'. . . knowledge, which shall be great, shall keep them acquainted. . .with the eternal sufferings of the lost.
What thou meanest by seizing the whole earth; but because I do it with a petty ship, I am called a robber, whilst thou who dost it with a great fleet art styled emperor.