It is a man's own dishonesty, his crimes, his wickedness, and boldness, that takes away from him soundness of mind; these are the furies, these the flames and firebrands, of the wicked.
I speak of that learning which wakes us acquainted with the boundless extent of nature, and the universe, and which even while we remain in this world, discovers to us both heaven, earth, and sea.
For books are more than books, they are the life, the very heart and core of ages past, the reason why men worked and died, the essence and quintessence of their lives.
When I consider the wonderful activity of the mind, so great a memory of what is past, and such a capacity of penetrating into the future: when I behold such a number of arts and sciences, and such a multitude of discoveries hence arising,--I believe and am firmly persuaded that a nature which contains so many things within itself cannot be mortal.
On the subject of the nature of the gods, the first question is Do the gods exist or do the not? It is difficult you may say to deny that they exist. I would agree if we were arguing the matter in a public assembly, but in a private discussion of this kind, it is perfectly easy to do so.