The only useful knowledge is that which teaches us how to seek what is good and avoid
what is evil; in short, how to increase the sum of human happiness. This is the great end: it maybe well or ill pursued, but that knowledge can be an enemy to happiness is to say
that men will enjoy less happiness, when they know how to seek it, than when they do
not. The reasoning is on a par with that of any one who should refuse when asked to
point out the road to York, saying that this inquirer would have a much better chance of
reaching York without direction than with it.
