The problem of distinguishing prime numbers from composite numbers and of resolving the latter into their prime factors is known to be one of the most important and useful in arithmetic. ↗
Material goods consist of useful material things, and of all rights to hold, or use, or derive benefits from material things, or to receive them at a future time. ↗
To busy oneself with what is futile when one can do something useful, to attend to what is simple when one has the mettle to attempt what is difficult, is to strip talent of its dignity. ↗
I think the Internet is absolutely extraordinary. It's very, very useful and I think one of the things we've got to do is make sure that the African continent gets on to that information super highway. ↗