Conjugal love, or the friendship of spouses, persists after sexual desires have weakened, withered, and disappeared.

Not to engage in this pursuit of ideas is to live like ants instead of like men.

All genuine learning is active, not passive. It involves the use of the mind, not just the memory. It is a process of discovery, in which the student is the main agent, not the teacher.

Erotic or sexual love can truly be love if it is not selfishly sexual or lustful.

Freedom is the emancipation from the arbitrary rule of other men.

One of the embarrassing problems for the early nineteenth-century champions of the Christian faith was that not one of the first six Presidents of the United States was an orthodox Christian.

More consequences for thought and action follow the affirmation or denial of God than from answering any other basic question.

In the case of good books, the point is not to see how many of them you can get through, but how many can get through to you.

A good book can teach you about the world and about yourself. You learn more than how to read better; you also learn more about life. You become wiser.

To agree without understanding is inane. To disagree without understanding is impudent.

The ultimate end of education is happiness or a good human life, a life enriched by the possession of every kind of good, by the enjoyment of every type of satisfaction.

I think prime numbers are like life. They are very logical but you could never work out the rules, even if you spent all your time thinking about them

There are certain moments in the history of a nation when the choices made define the decades to come.

Today there are hundreds of millions of mobile devices, but you do have to know a bit about what each device is capable of doing in order to approach it as a developer.

We have to fight off the demons that have been hanging around suicide for centuries.

Neither in writing nor in reading wilt thou be able to lay down rules for others before thou shalt have first learned to obey rules thyself.

Middle Age, a restful, welcome break from real life, brings some unique opportunities.

You have to make peace with yourself. The key is to find the harmony in what you have.

In wine there is health (In vino sanitas)

A number of religions in Ankh-Morpork still practiced human sacrifice, except that they didn't really need to practice any more because they had got so good at it.

Thou hast no figures nor no fantasies Which busy care draws in the brains of men; Therefore thou sleep'st so sound.