How to have a beautiful mind. Edward De Bono. 2004.

We spend a small fortune on clothes, cosmetics, diets and workouts - even surgery - to make our bodies more attractive. Yet we hardly consider the one thing that enhances everyone’s appeal. It costs nothing, takes very little time, and without it  even the most physically beautiful person will be unattractive: it is a beautiful mind. No matter how stunning you are, if your mind is dull you have no hope of impressing people in any situation.

It doesn’t need a high IQ, or reams of knowledge, or a great personality. All it needs is creativity, imagination and empathy - all techniques that anyone can learn.