Carnegie always advised readers to read this book together with The Merits of Human Nature. The difference between the two is that "The Merits of Human Nature" mainly tells people some basic principles to overcome anxiety, but it is more about guiding people how to obtain happiness. In this book, Carnegie clarifies such a point of view: injecting happiness into the soul and eliminating wrong thoughts is more important than cutting off tumors and abscesses on the body.Happiness is a state of mind, a choice.When people's mentality becomes positive, they can get happiness and change their destiny.Optimistic and open-minded people can find the joy of life in ordinary days, can live freely and freely in heavy life, can make the time of suffering sweet and precious, and can make tedious matters simple and feasible... At this time , happiness has come!

The value of life does not lie in whether we succeed or fail, whether we are going against the wind or going smoothly, but in how much happiness we feel from it.These ancient and ever-new human wisdom will help us recognize the real life and real happiness. Life is long, let us open this book and step into the paradise of life.