The application scenarios of drones far exceed our imagination.

the most famous composer in the world but was utterly miserable most of the time, and of the reasons was because he always overspent his income.This was Mozart.If Mozart couldn't get by with this kind of asinine conduct, I don't think you should try.

The best way to own stocks is through an index fund.

Actions are right in proportion as they tend to promote happiness； wrong as they tend to produce the reverse of happiness.