How does one learn to say no sometimes? How can one avoid always putting the wishes of others before their own? How does one measure kindness?

In a world that is not always kind, excessive friendliness can sometimes be exploited. However, one can learn to assert themselves as a nice person. François Lelord shows those who quickly trust others, who are modest, and who do not push themselves to the forefront, ways to be happier and more successful. With great empathy, he guides the helpful, sincere, and considerate people who have grown dear to him over the years in his work as a psychotherapist towards greater respect—without distorting their friendly nature. This charming book helps to understand one's own personality and teaches an important skill: to be nice, but not too nice.